{"id":842822,"date":"2021-08-23T00:20:59","date_gmt":"2021-08-23T03:20:59","guid":{"rendered":"https:\/\/www.estrategiaconcursos.com.br\/blog\/?p=842822"},"modified":"2021-08-23T01:13:55","modified_gmt":"2021-08-23T04:13:55","slug":"gabarito-extraoficial-pcdf-agente-matematica-e-raciocinio-logico","status":"publish","type":"post","link":"https:\/\/www.estrategiaconcursos.com.br\/blog\/gabarito-extraoficial-pcdf-agente-matematica-e-raciocinio-logico\/","title":{"rendered":"Gabarito Extraoficial PCDF (Agente): Matem\u00e1tica e Racioc\u00ednio L\u00f3gico."},"content":{"rendered":"\n<p>Fala, pessoal!<\/p>\n\n\n\n<p>Sou o Eduardo Mocellin, professor de Matem\u00e1tica e de Racioc\u00ednio L\u00f3gico do Estrat\u00e9gia Concursos.<\/p>\n\n\n\n<p>Neste artigo, disponibilizo o gabarito extraoficial da disciplina de <strong>Matem\u00e1tica e Racioc\u00ednio L\u00f3gico<\/strong> da prova da PCDF de 2021 para o <strong>cargo de Agente<\/strong>.<\/p>\n\n\n\n<p>Ressalto que a ordem das quest\u00f5es pode variar de acordo com cada modelo de prova.<\/p>\n\n\n\n<p>Antes de analisarmos as quest\u00f5es,&nbsp;<strong>convido voc\u00ea a me seguir no Instagram:&nbsp;<a href=\"https:\/\/www.instagram.com\/edu.mocellin\"><strong>@edu.mocellin<\/strong><\/a><\/strong><\/p>\n\n\n\n<p class=\"has-text-align-center has-pale-cyan-blue-background-color has-background\"><strong>Texto para as quest\u00f5es 43 a 46<\/strong><\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"493\" height=\"390\" src=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/08\/22232624\/image-583.png\" alt=\"\" class=\"wp-image-842823\" srcset=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/08\/22232624\/image-583.png 493w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/08\/22232624\/image-583-300x237.png 300w\" sizes=\"auto, (max-width: 493px) 100vw, 493px\" \/><\/figure><\/div>\n\n\n\n<p>Antes de resolver a quest\u00e3o, devemos nos atentar para alguns detalhes do enunciado.<\/p>\n\n\n\n<p>Perceba que ocorre uma <strong>distin\u00e7\u00e3o entre dois tipos de cumprimentos<\/strong>: &#8220;<strong>apertos de m\u00e3o<\/strong>&#8221; e &#8220;<strong>acenos<\/strong>&#8220;.<\/p>\n\n\n\n<p>Podemos entender que um &#8220;<strong>aperto de m\u00e3o<\/strong>&#8220;, que ocorre entre rapazes, \u00e9 <strong>rec\u00edproco<\/strong>. Isto \u00e9, se um rapaz A cumprimenta com um &#8220;aperto de m\u00e3o&#8221; um rapaz B, entende-se que esse \u00fanico &#8220;aperto de m\u00e3o&#8221; tamb\u00e9m corresponde ao &#8220;aperto de m\u00e3o&#8221; de B para A.<\/p>\n\n\n\n<p>Por outro lado, podemos entender que <strong>um<\/strong> <strong>aceno n\u00e3o \u00e9 rec\u00edproco<\/strong>, isto \u00e9, se uma mo\u00e7a A acena para uma mo\u00e7a B, esse aceno n\u00e3o corresponde ao aceno de B para A.<\/p>\n\n\n\n<p>Em resumo, partiremos do seguinte entendimento:<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>Entre dois rapazes: 1 aperto de m\u00e3o;<\/li><li>Entre duas mo\u00e7as: 2 acenos;<\/li><li>De uma mo\u00e7a para um rapaz: 1 aceno.<\/li><\/ul>\n\n\n\n<p class=\"has-vivid-red-color has-text-color\"><strong>Observe que, se o &#8220;aceno&#8221; fosse rec\u00edproco, n\u00e3o haveria sentido dizer que cada mo\u00e7a cumprimentou a todos<\/strong> <strong>com um aceno. Isso porque os rapazes n\u00e3o responderiam aos &#8220;acenos&#8221;, pois eles somente cumprimentam com &#8220;apertos de m\u00e3o&#8221; outros rapazes.<\/strong><\/p>\n\n\n\n<p class=\"has-text-align-center has-cyan-bluish-gray-background-color has-background\"><strong>Quest\u00e3o 43<\/strong><\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"577\" height=\"64\" src=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/08\/23000644\/image-585.png\" alt=\"\" class=\"wp-image-842827\" srcset=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/08\/23000644\/image-585.png 577w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/08\/23000644\/image-585-300x33.png 300w\" sizes=\"auto, (max-width: 577px) 100vw, 577px\" \/><\/figure><\/div>\n\n\n\n<p><strong>Gabarito: CERTO.<\/strong><\/p>\n\n\n\n<p>Sabemos que cada mo\u00e7a cumprimenta com um aceno outra mo\u00e7a.<\/p>\n\n\n\n<p>Lembre-se que um aceno n\u00e3o \u00e9 rec\u00edproco, isto \u00e9, se uma mo\u00e7a A acena para uma mo\u00e7a B, esse aceno n\u00e3o corresponde ao aceno de B para A.<\/p>\n\n\n\n<p>Como temos um total de 20 mo\u00e7as que cumprimentam as outras 19, o n\u00famero de cumprimentos com acenos entre mo\u00e7as foi:<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"294\" height=\"115\" src=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/08\/23000713\/image-586.png\" alt=\"\" class=\"wp-image-842828\" \/><\/figure><\/div>\n\n\n\n<p>Portanto, o n\u00famero de cumprimentos com acenos entre mo\u00e7as foi superior a 200.<\/p>\n\n\n\n<p class=\"has-text-align-center has-cyan-bluish-gray-background-color has-background\"><strong>Quest\u00e3o 44<\/strong><\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"593\" height=\"86\" src=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/08\/23000753\/image-588.png\" alt=\"\" class=\"wp-image-842830\" srcset=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/08\/23000753\/image-588.png 593w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/08\/23000753\/image-588-300x44.png 300w\" sizes=\"auto, (max-width: 593px) 100vw, 593px\" \/><\/figure><\/div>\n\n\n\n<p><strong>Gabarito: CERTO.<\/strong><\/p>\n\n\n\n<p>Cada uma das 20 mo\u00e7as cumprimenta com um aceno cada um dos 18 rapazes. Logo, o total de acenos entre mo\u00e7as e rapazes foi de:<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"311\" height=\"125\" src=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/08\/23000809\/image-589.png\" alt=\"\" class=\"wp-image-842831\" srcset=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/08\/23000809\/image-589.png 311w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/08\/23000809\/image-589-300x121.png 300w\" sizes=\"auto, (max-width: 311px) 100vw, 311px\" \/><\/figure><\/div>\n\n\n\n<p>Portanto, o n\u00famero de cumprimentos entre mo\u00e7as e rapazes com acenos foi superior a 350.<\/p>\n\n\n\n<p class=\"has-text-align-center has-cyan-bluish-gray-background-color has-background\"><strong>Quest\u00e3o 45<\/strong><\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/08\/23000847\/image-591.png\" alt=\"\" class=\"wp-image-842833\" width=\"648\" height=\"70\" srcset=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/08\/23000847\/image-591.png 589w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/08\/23000847\/image-591-300x33.png 300w\" sizes=\"auto, (max-width: 648px) 100vw, 648px\" \/><\/figure><\/div>\n\n\n\n<p><strong>Gabarito: CERTO.<\/strong><\/p>\n\n\n\n<p>Suponha que temos um total de <strong>M<\/strong> mo\u00e7as e <strong>R<\/strong> rapazes.<\/p>\n\n\n\n<p>Observe que, entre rapazes e mo\u00e7as, ocorre apenas um aceno das mo\u00e7as para os rapazes. Isso porque, conforme o enunciado, os rapazes cumprimentam apenas os outros rapazes com um &#8220;aperto de m\u00e3o&#8221;.<\/p>\n\n\n\n<p>Logo, cada uma das <strong>M<\/strong> mo\u00e7as cumprimentam (com um aceno) os <strong>R<\/strong> rapazes.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"768\" height=\"112\" src=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/08\/23000912\/image-592.png\" alt=\"\" class=\"wp-image-842834\" srcset=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/08\/23000912\/image-592.png 768w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/08\/23000912\/image-592-300x44.png 300w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/08\/23000912\/image-592-610x89.png 610w\" sizes=\"auto, (max-width: 768px) 100vw, 768px\" \/><\/figure><\/div>\n\n\n\n<p>Note, portanto, que o n\u00famero de cumprimentos entre rapazes e mo\u00e7as \u00e9 <strong>M\u00d7R<\/strong>. Logo, esse n\u00famero \u00e9 proporcional ao n\u00famero de rapazes <strong>R<\/strong>.<\/p>\n\n\n\n<p class=\"has-text-align-center has-cyan-bluish-gray-background-color has-background\"><strong>Quest\u00e3o 46<\/strong><\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"589\" height=\"89\" src=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/08\/23000942\/image-594.png\" alt=\"\" class=\"wp-image-842836\" srcset=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/08\/23000942\/image-594.png 589w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/08\/23000942\/image-594-300x45.png 300w\" sizes=\"auto, (max-width: 589px) 100vw, 589px\" \/><\/figure><\/div>\n\n\n\n<p><strong>Gabarito: ERRADO.<\/strong><\/p>\n\n\n\n<p>Considere que temos <strong>M<\/strong> mo\u00e7as e <strong>R<\/strong> rapazes. O total de cumprimentos corresponde \u00e0 seguinte soma:<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>Acenos de mo\u00e7as para rapazes;<\/li><li>Acenos entre mo\u00e7as; e<\/li><li>Apertos de m\u00e3o entre rapazes.<\/li><\/ul>\n\n\n\n<p>O total de acenos de mo\u00e7as para rapazes \u00e9 <strong>M\u00d7R<\/strong>, pois cada uma das <strong>M<\/strong> mo\u00e7as cumprimentam (com um aceno) os <strong>R<\/strong> rapazes:<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"564\" height=\"128\" src=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/08\/23000958\/image-595.png\" alt=\"\" class=\"wp-image-842837\" srcset=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/08\/23000958\/image-595.png 564w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/08\/23000958\/image-595-300x68.png 300w\" sizes=\"auto, (max-width: 564px) 100vw, 564px\" \/><\/figure><\/div>\n\n\n\n<p>O total de acenos entre mo\u00e7as \u00e9 <strong>M\u00d7(M\u22121)<\/strong>, pois cada uma das <strong>M<\/strong> mo\u00e7as cumprimentam com um aceno as outras <strong>M\u22121<\/strong> mo\u00e7as.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"484\" height=\"113\" src=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/08\/23001018\/image-597.png\" alt=\"\" class=\"wp-image-842839\" srcset=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/08\/23001018\/image-597.png 484w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/08\/23001018\/image-597-300x70.png 300w\" sizes=\"auto, (max-width: 484px) 100vw, 484px\" \/><\/figure><\/div>\n\n\n\n<p>Agora vamos obter o n\u00famero de cumprimentos com apertos de m\u00e3o entre rapazes.<\/p>\n\n\n\n<p>Lembre-se que um aperto de m\u00e3o \u00e9 rec\u00edproco, isto \u00e9, se um rapaz A realiza um aperto de m\u00e3o com um rapaz B, necessariamente esse aperto de m\u00e3o corresponde ao aperto de B para A.<\/p>\n\n\n\n<p><strong>Caso o aperto de m\u00e3o n\u00e3o fosse rec\u00edproco<\/strong>, ter\u00edamos cada um dos <strong>R<\/strong> rapazes cumprimentando os outros <strong>(R\u22121)<\/strong> rapazes e, portanto, ter\u00edamos <strong>R\u00d7(R\u22121)<\/strong> apertos de m\u00e3o. Ocorre que, <strong>como os apertos de m\u00e3o s\u00e3o rec\u00edprocos<\/strong>, estamos contando os apertos em duplicidade, de modo que o total de apertos de m\u00e3o \u00e9:<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"487\" height=\"88\" src=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/08\/23001037\/image-598.png\" alt=\"\" class=\"wp-image-842840\" srcset=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/08\/23001037\/image-598.png 487w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/08\/23001037\/image-598-300x54.png 300w\" sizes=\"auto, (max-width: 487px) 100vw, 487px\" \/><\/figure><\/div>\n\n\n\n<p>Outra forma de calcular o n\u00famero de apertos de m\u00e3o \u00e9 pensar que, a cada grupo formado com 2 rapazes, temos um aperto de m\u00e3o. Portanto, o n\u00famero de apertos de m\u00e3o entre <strong>R <\/strong>rapazes corresponde a:<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"701\" height=\"93\" src=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/08\/23001051\/image-599.png\" alt=\"\" class=\"wp-image-842841\" srcset=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/08\/23001051\/image-599.png 701w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/08\/23001051\/image-599-300x40.png 300w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/08\/23001051\/image-599-610x81.png 610w\" sizes=\"auto, (max-width: 701px) 100vw, 701px\" \/><\/figure><\/div>\n\n\n\n<p>Em resumo, o total de cumprimentos \u00e9 a seguinte soma:<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"601\" height=\"82\" src=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/08\/23001111\/image-600.png\" alt=\"\" class=\"wp-image-842842\" srcset=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/08\/23001111\/image-600.png 601w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/08\/23001111\/image-600-300x41.png 300w\" sizes=\"auto, (max-width: 601px) 100vw, 601px\" \/><\/figure><\/div>\n\n\n\n<p>A quest\u00e3o pergunta se esse n\u00famero \u00e9 proporcional ao n\u00famero de pessoas presentes, isto \u00e9, proporcional \u00e0 soma de mo\u00e7as e rapazes <strong>(M+R)<\/strong>. Essa afirma\u00e7\u00e3o \u00e9 falsa, pois n\u00e3o podemos, na equa\u00e7\u00e3o acima, colocar em evid\u00eancia o fator <strong>(M+R)<\/strong>.<\/p>\n\n\n\n<p>Para mostrar que o total de cumprimentos n\u00e3o \u00e9 proporcional, vamos usar dois casos particulares.<\/p>\n\n\n\n<p>Considere que temos 2 mo\u00e7as e 2 rapazes, isto \u00e9, <strong>M = 2<\/strong> e <strong>R = 2<\/strong>. Nesse caso, o total de cumprimentos \u00e9:<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"628\" height=\"186\" src=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/08\/23001141\/image-602.png\" alt=\"\" class=\"wp-image-842844\" srcset=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/08\/23001141\/image-602.png 628w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/08\/23001141\/image-602-300x89.png 300w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/08\/23001141\/image-602-610x181.png 610w\" sizes=\"auto, (max-width: 628px) 100vw, 628px\" \/><\/figure><\/div>\n\n\n\n<p>Note, portanto, que <strong>para 4 pessoas<\/strong> (2 mo\u00e7as e 2 rapazes), temos <strong>7 cumprimentos<\/strong>.<\/p>\n\n\n\n<p>Considere agora que temos 4 mo\u00e7as e 4 rapazes, isto \u00e9, <strong>M = 4<\/strong> e <strong>R = 4<\/strong>. Nesse caso, o total de cumprimentos \u00e9:<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"630\" height=\"192\" src=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/08\/23001157\/image-603.png\" alt=\"\" class=\"wp-image-842845\" srcset=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/08\/23001157\/image-603.png 630w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/08\/23001157\/image-603-300x91.png 300w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/08\/23001157\/image-603-610x186.png 610w\" sizes=\"auto, (max-width: 630px) 100vw, 630px\" \/><\/figure><\/div>\n\n\n\n<p>Note, portanto, que <strong>para 8 pessoas<\/strong> (4 mo\u00e7as e 4 rapazes), temos <strong>34 cumprimentos<\/strong>. Veja que dobramos o n\u00famero de pessoas (de 4 para 8) e, como consequ\u00eancia disso, mais do que dobramos o n\u00famero de cumprimentos (de 7 para 34). Logo, <strong>o n\u00famero total de cumprimentos n\u00e3o \u00e9 proporcional ao n\u00famero de pessoas presentes<\/strong>.<\/p>\n\n\n\n<p class=\"has-text-align-center has-pale-cyan-blue-background-color has-background\"><strong>Texto para as quest\u00f5es 47 a 50<\/strong><\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"699\" height=\"355\" src=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/08\/23001233\/image-605.png\" alt=\"\" class=\"wp-image-842847\" srcset=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/08\/23001233\/image-605.png 699w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/08\/23001233\/image-605-300x152.png 300w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/08\/23001233\/image-605-610x310.png 610w\" sizes=\"auto, (max-width: 699px) 100vw, 699px\" \/><\/figure><\/div>\n\n\n\n<p class=\"has-text-align-center has-cyan-bluish-gray-background-color has-background\"><strong>Quest\u00e3o 47<\/strong><\/p>\n\n\n\n<p><strong>Gabarito: CERTO<\/strong>.<\/p>\n\n\n\n<p>Para responder essa quest\u00e3o, devemos lembrar que <strong>quando a disjun\u00e7\u00e3o inclusiva &#8220;ou&#8221; \u00e9 falsa, ambos os termos s\u00e3o falsos<\/strong>. Portanto, como os tr\u00eas que se pronunciaram mentiram nas afirma\u00e7\u00f5es, temos:<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"451\" height=\"243\" src=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/08\/23001303\/image-607.png\" alt=\"\" class=\"wp-image-842849\" srcset=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/08\/23001303\/image-607.png 451w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/08\/23001303\/image-607-300x162.png 300w\" sizes=\"auto, (max-width: 451px) 100vw, 451px\" \/><\/figure><\/div>\n\n\n\n<p>Isso significa que <strong>Marcos, Carlos e Fernando<\/strong> <strong><u>n\u00e3o<\/u> s\u00e3o culpados<\/strong>. Como exatamente dois s\u00e3o culpados, os amigos que restaram, <strong>Luiz e Paulo<\/strong>, <strong>s\u00e3o os culpados<\/strong>.<\/p>\n\n\n\n<p class=\"has-text-align-center has-cyan-bluish-gray-background-color has-background\"><strong>Quest\u00e3o 48<\/strong><\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"699\" height=\"109\" src=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/08\/23001323\/image-609.png\" alt=\"\" class=\"wp-image-842851\" srcset=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/08\/23001323\/image-609.png 699w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/08\/23001323\/image-609-300x47.png 300w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/08\/23001323\/image-609-610x95.png 610w\" sizes=\"auto, (max-width: 699px) 100vw, 699px\" \/><\/figure><\/div>\n\n\n\n<p><strong>Gabarito: ERRADO.<\/strong><\/p>\n\n\n\n<p>Sejam as proposi\u00e7\u00f5es simples:<\/p>\n\n\n\n<p class=\"has-text-align-center\"><strong>m<\/strong>: &#8220;Marcos \u00e9 culpado.&#8221;<\/p>\n\n\n\n<p class=\"has-text-align-center\"><strong>p<\/strong>: &#8220;Paulo \u00e9 culpado.&#8221;<\/p>\n\n\n\n<p class=\"has-text-align-center\"><strong>c<\/strong>: &#8220;Carlos \u00e9 culpado.&#8221;<\/p>\n\n\n\n<p><strong>Dado o contexto da quest\u00e3o, vamos considerar a nega\u00e7\u00e3o de &#8220;\u00e9 culpado&#8221; como &#8220;\u00e9 inocente&#8221;<\/strong>. Sabemos que a melhor forma de negar &#8220;\u00e9 culpado&#8221; seria utilizar a express\u00e3o &#8220;n\u00e3o \u00e9 culpado&#8221;. Ocorre que muitas bancas, como o CESPE, costumam ignorar essa sutileza em quest\u00f5es de <strong>equival\u00eancias l\u00f3gicas<\/strong> e de <strong>l\u00f3gica de argumenta\u00e7\u00e3o<\/strong>. Assim, as nega\u00e7\u00f5es ficam:<\/p>\n\n\n\n<p class=\"has-text-align-center\"><strong>~<\/strong><strong>m<\/strong>: &#8220;Marcos \u00e9 inocente.&#8221;<\/p>\n\n\n\n<p class=\"has-text-align-center\"><strong>~<\/strong><strong>p<\/strong>: &#8220;Paulo \u00e9 inocente.&#8221;<\/p>\n\n\n\n<p class=\"has-text-align-center\"><strong>~<\/strong><strong>c<\/strong>: &#8220;Carlos \u00e9 inocente.&#8221;<\/p>\n\n\n\n<p>Observe que a proposi\u00e7\u00e3o do enunciado pode ser descrita por <strong>m<\/strong><strong>\u2192<\/strong><strong> <\/strong><strong>~<\/strong><strong>p<\/strong><strong> <\/strong><strong>\u2228 <\/strong><strong>~<\/strong><strong>c<\/strong>.<\/p>\n\n\n\n<p class=\"has-text-align-center\"><strong>m<\/strong><strong>\u2192<\/strong><strong> <\/strong><strong>~<\/strong><strong>p<\/strong><strong> <\/strong><strong>\u2228 <\/strong><strong>~<\/strong><strong>c<\/strong><strong>: <\/strong>&#8220;<strong>Se<\/strong> <strong>[<\/strong>Marcos \u00e9 culpado<strong>]<\/strong>, <strong>ent\u00e3o<\/strong> <strong>[(<\/strong>Paulo<strong>)<\/strong> <strong>ou<\/strong> <strong>(<\/strong>Carlos s\u00e3o inocentes<strong>)]<\/strong>.&#8221;<\/p>\n\n\n\n<p>Em outras palavras:<\/p>\n\n\n\n<p class=\"has-text-align-center\"><strong>m<\/strong><strong>\u2192<\/strong><strong> <\/strong><strong>~<\/strong><strong>p<\/strong><strong> <\/strong><strong>\u2228 <\/strong><strong>~<\/strong><strong>c<\/strong><strong>: <\/strong>&#8220;<strong>Se<\/strong> <strong>[<\/strong>Marcos \u00e9 culpado<strong>]<\/strong>, <strong>ent\u00e3o<\/strong> <strong>[(<\/strong>Paulo \u00e9 inocente<strong>)<\/strong> <strong>ou<\/strong> <strong>(<\/strong>Carlos \u00e9 inocente<strong>)]<\/strong>.&#8221;<\/p>\n\n\n\n<p>Observe que a proposi\u00e7\u00e3o do enunciado \u00e9 uma condicional e que a suposta equival\u00eancia \u00e9 uma condicional. Isso significa que devemos utilizar a <strong>contrapositiva<\/strong> <strong>p<\/strong><strong>\u2192<\/strong><strong>q <\/strong><strong>\u2261<\/strong><strong> <\/strong><strong>~<\/strong><strong>q<\/strong><strong>\u2192<\/strong><strong>~<\/strong><strong>p<\/strong>. Para aplicar essa equival\u00eancia, devemos realizar o seguinte procedimento:<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li><strong>Invertem-se as posi\u00e7\u00f5es do antecedente e do consequente; e<\/strong><strong><\/strong><\/li><li><strong>Negam-se ambos os termos da condicional.<\/strong><strong><\/strong><\/li><\/ul>\n\n\n\n<p>Para o caso em quest\u00e3o, temos:<\/p>\n\n\n\n<p class=\"has-text-align-center\"><strong>m<\/strong><strong>\u2192<\/strong><strong> <\/strong><strong>~<\/strong><strong>p<\/strong><strong> <\/strong><strong>\u2228 <\/strong><strong>~<\/strong><strong>c<\/strong> \u2261<strong>~<\/strong><strong> (<\/strong><strong>~<\/strong><strong>p<\/strong><strong>\u2228<\/strong><strong>~<\/strong><strong>c<\/strong><strong>)<\/strong><strong> \u2192 <\/strong><strong>~<\/strong><strong>m<\/strong><\/p>\n\n\n\n<p>O antecedente obtido, <strong>~<\/strong><strong> (<\/strong><strong>~<\/strong><strong>p<\/strong><strong>\u2228<\/strong><strong>~<\/strong><strong>c<\/strong><strong>)<\/strong>, pode ainda ser desenvolvido por De Morgan. Nesse caso, <strong>negam-se as duas parcelas e troca-se o &#8220;ou&#8221; pelo &#8220;e&#8221;.<\/strong> Temos:<\/p>\n\n\n\n<p class=\"has-text-align-center\"><strong>m<\/strong><strong>\u2192<\/strong><strong> <\/strong><strong>~<\/strong><strong>p<\/strong><strong> <\/strong><strong>\u2228 <\/strong><strong>~<\/strong><strong>c<\/strong> \u2261 <strong>~<\/strong><strong>(<\/strong><strong>~<\/strong><strong>p)<\/strong><strong>\u2227~<\/strong><strong>(<\/strong><strong>~<\/strong><strong>c<\/strong><strong>)<\/strong><strong> \u2192 <\/strong><strong>~<\/strong><strong>m<\/strong><\/p>\n\n\n\n<p>A dupla nega\u00e7\u00e3o corresponde \u00e0 proposi\u00e7\u00e3o original. Logo:<\/p>\n\n\n\n<p class=\"has-text-align-center\"><strong>m<\/strong><strong>\u2192<\/strong><strong> <\/strong><strong>~<\/strong><strong>p<\/strong><strong> <\/strong><strong>\u2228 <\/strong><strong>~<\/strong><strong>c<\/strong> \u2261 <strong>p<\/strong><strong>\u2227<\/strong><strong>c<\/strong><strong> \u2192 <\/strong><strong>~<\/strong><strong>m<\/strong><\/p>\n\n\n\n<p>A condicional acima pode ser expressa por:<\/p>\n\n\n\n<p class=\"has-text-align-center\"><strong>p<\/strong><strong>\u2227<\/strong><strong>c<\/strong><strong> \u2192 <\/strong><strong>~<\/strong><strong>m<\/strong>: &#8220;<strong>Se<\/strong> <strong>[(<\/strong>Paulo \u00e9 culpado<strong>)<\/strong> <strong>e<\/strong> <strong>(<\/strong>Carlos \u00e9 culpado<strong>)]<\/strong>, <strong>ent\u00e3o<\/strong> <strong>[<\/strong>Marcos \u00e9 inocente<strong>]<\/strong>.&#8221;<\/p>\n\n\n\n<p>A assertiva erra ao n\u00e3o trocar o &#8220;ou&#8221; pelo &#8220;e&#8221;. Veja o que foi apresentado:<\/p>\n\n\n\n<p class=\"has-text-align-center\"><strong>p\u2227c \u2192 ~m: <\/strong>&#8220;<strong>Se<\/strong> <strong>[(<\/strong>Paulo<strong>)<\/strong> <strong>ou<\/strong> <strong>(<\/strong>Carlos s\u00e3o culpados<strong>)]<\/strong>, <strong>ent\u00e3o<\/strong> <strong>[<\/strong>Marcos \u00e9 inocente<strong>]<\/strong>.&#8221;<\/p>\n\n\n\n<p>O <strong>gabarito<\/strong>, portanto, \u00e9 <strong>ERRADO<\/strong>.<\/p>\n\n\n\n<p class=\"has-text-align-center has-cyan-bluish-gray-background-color has-background\"><strong>Quest\u00e3o 49<\/strong><\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"699\" height=\"167\" src=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/08\/23001457\/image-611.png\" alt=\"\" class=\"wp-image-842853\" srcset=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/08\/23001457\/image-611.png 699w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/08\/23001457\/image-611-300x72.png 300w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/08\/23001457\/image-611-610x146.png 610w\" sizes=\"auto, (max-width: 699px) 100vw, 699px\" \/><\/figure><\/div>\n\n\n\n<p><strong>Gabarito: ERRADO.<\/strong><\/p>\n\n\n\n<p>Como Carlos nasceu em 1994, a idade dele, considerando que ele j\u00e1 fez anivers\u00e1rio em 2021, \u00e9:<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"264\" height=\"47\" src=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/08\/23001515\/image-613.png\" alt=\"\" class=\"wp-image-842855\" \/><\/figure><\/div>\n\n\n\n<p>Considere aqui que as idades de Lu\u00eds, Fernando, Paulo, Carlos e Marcos sejam, respectivamente, L, F, P, C e M.<\/p>\n\n\n\n<p>Assim, temos as seguintes informa\u00e7\u00f5es:<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>Todos eles ter\u00e3o mais de quinze anos de idade:<\/li><\/ul>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"201\" height=\"38\" src=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/08\/23001531\/image-614.png\" alt=\"\" class=\"wp-image-842856\" \/><\/figure><\/div>\n\n\n\n<ul class=\"wp-block-list\"><li>Carlos nasceu em 1994:<\/li><\/ul>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"93\" height=\"37\" src=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/08\/23001615\/image-616.png\" alt=\"\" class=\"wp-image-842858\" \/><\/figure><\/div>\n\n\n\n<ul class=\"wp-block-list\"><li>A diferen\u00e7a de idade entre os dois mais velhos \u00e9 10 anos:<\/li><\/ul>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"458\" height=\"31\" src=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/08\/23001646\/image-618.png\" alt=\"\" class=\"wp-image-842860\" srcset=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/08\/23001646\/image-618.png 458w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/08\/23001646\/image-618-300x20.png 300w\" sizes=\"auto, (max-width: 458px) 100vw, 458px\" \/><\/figure><\/div>\n\n\n\n<ul class=\"wp-block-list\"><li>A soma das idades \u00e9 igual a 110 anos:<\/li><\/ul>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"285\" height=\"52\" src=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/08\/23001708\/image-620.png\" alt=\"\" class=\"wp-image-842862\" \/><\/figure><\/div>\n\n\n\n<p>A partir dessas informa\u00e7\u00f5es, devemos saber se \u00e9 correto afirmar que, no m\u00e1ximo, dois deles t\u00eam dezoito anos de idade ou menos.<\/p>\n\n\n\n<p>Vamos avaliar tr\u00eas poss\u00edveis casos:<\/p>\n\n\n\n<ol class=\"wp-block-list\" type=\"1\"><li><strong>Carlos \u00e9 o mais velho;<\/strong><\/li><li><strong>Carlos \u00e9 o segundo mais velho;<\/strong><\/li><li><strong>Carlos n\u00e3o \u00e9 o primeiro nem o segundo mais velho.<\/strong><\/li><\/ol>\n\n\n\n<p class=\"has-text-align-center\"><strong>1. Carlos \u00e9 o mais velho<\/strong><\/p>\n\n\n\n<p>Sabemos que Carlos tem 27 anos. Nesse caso, como a diferen\u00e7a de idade entre os dois mais velhos \u00e9 10 anos, o segundo mais velho ter\u00e1:<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"213\" height=\"52\" src=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/08\/23001736\/image-621.png\" alt=\"\" class=\"wp-image-842863\" \/><\/figure><\/div>\n\n\n\n<p>Veja que, nesse caso, <strong>n\u00e3o podemos afirmar que &#8220;no m\u00e1ximo dois deles t\u00eam dezoito anos de idade ou menos&#8221;<\/strong>. Isso porque todos os outros suspeitos, exceto Carlos, teriam 17 anos ou menos.<\/p>\n\n\n\n<p>Al\u00e9m disso, tendo o segundo mais velho 17 anos, n\u00e3o ter\u00edamos 110 como a soma das idades. Isso porque, mesmo que os demais tamb\u00e9m tenham 17 anos, a soma daria:<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"280\" height=\"161\" src=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/08\/23001757\/image-623.png\" alt=\"\" class=\"wp-image-842865\" \/><\/figure><\/div>\n\n\n\n<p class=\"has-text-align-center\"><strong>2. Carlos \u00e9 o segundo mais velho<\/strong><\/p>\n\n\n\n<p>Nesse caso, o mais velho ter\u00e1 10 anos a mais do que Carlos. Suponha, arbitrariamente, que Lu\u00eds seria o mais velho. Nesse caso, temos:<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"213\" height=\"35\" src=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/08\/23001816\/image-625.png\" alt=\"\" class=\"wp-image-842867\" \/><\/figure><\/div>\n\n\n\n<p>Sabemos que a soma das idades \u00e9 igual a 110 anos:<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"305\" height=\"207\" src=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/08\/23001831\/image-627.png\" alt=\"\" class=\"wp-image-842869\" srcset=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/08\/23001831\/image-627.png 305w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/08\/23001831\/image-627-300x204.png 300w\" sizes=\"auto, (max-width: 305px) 100vw, 305px\" \/><\/figure><\/div>\n\n\n\n<p>Como todos devem ter mais do que 15 anos de idade, eles devem ter no m\u00ednimo 16 anos de idade.<\/p>\n\n\n\n<p>Observe que, mesmo que <strong>Fernando, Paulo e Marcos<\/strong> tenham 16 anos, n\u00e3o conseguiremos obter a soma&nbsp;<strong>F + P + M = 46<\/strong>, pois <strong>3 \u00d7 16 = 48<\/strong>.<\/p>\n\n\n\n<p>Portanto, para esse caso, tamb\u00e9m <strong>n\u00e3o podemos afirmar que &#8220;no m\u00e1ximo dois deles t\u00eam dezoito anos de idade ou menos&#8221;<\/strong>.<\/p>\n\n\n\n<p class=\"has-text-align-center\"><strong>3. Carlos n\u00e3o \u00e9 o primeiro nem o segundo mais velho.<\/strong><\/p>\n\n\n\n<p>Vamos supor, arbitrariamente, que <strong>Lu\u00eds seja o mais velho<\/strong> e que <strong>Fernando seja o segundo mais velho<\/strong>. Nesse caso:<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"138\" height=\"51\" src=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/08\/23001915\/image-629.png\" alt=\"\" class=\"wp-image-842871\" \/><\/figure><\/div>\n\n\n\n<p>Sabemos que a soma das idades \u00e9 igual a 110 anos:<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"388\" height=\"267\" src=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/08\/23001933\/image-631.png\" alt=\"\" class=\"wp-image-842873\" srcset=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/08\/23001933\/image-631.png 388w, https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/08\/23001933\/image-631-300x206.png 300w\" sizes=\"auto, (max-width: 388px) 100vw, 388px\" \/><\/figure><\/div>\n\n\n\n<p>Lembre-se que <strong>Fernando \u00e9 o segundo mais velho<\/strong> e Carlos n\u00e3o \u00e9 o primeiro nem o segundo mais velho. Se minimizarmos a idade de Fernando, observe que, no pior dos casos, ele ter\u00e1 a idade de Carlos. Nesse caso limite, teremos:<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"238\" height=\"211\" src=\"https:\/\/dhg1h5j42swfq.cloudfront.net\/2021\/08\/23001948\/image-633.png\" alt=\"\" class=\"wp-image-842875\" \/><\/figure><\/div>\n\n\n\n<p>Veja que, mesmo a idade de <strong>Fernando<\/strong> sendo a menor poss\u00edvel, Paulo e Marcos n\u00e3o ter\u00e3o mais do que 15 anos, contrariando o enunciado.<\/p>\n\n\n\n<p>Portanto, para esse terceiro e \u00faltimo caso, tamb\u00e9m <strong>n\u00e3o podemos afirmar que &#8220;no m\u00e1ximo dois deles t\u00eam dezoito anos de idade ou menos&#8221;<\/strong>.<\/p>\n\n\n\n<p class=\"has-text-align-center has-pale-cyan-blue-background-color has-background\"><strong>Considera\u00e7\u00f5es Finais<\/strong><\/p>\n\n\n\n<p>Esse \u00e9 o nosso gabarito extraoficial da disciplina de&nbsp;<strong>Matem\u00e1tica e<\/strong>&nbsp;<strong>Racioc\u00ednio L\u00f3gico<\/strong>. Espero que tenham alcan\u00e7ado um bom desempenho. At\u00e9 a pr\u00f3xima!<\/p>\n\n\n\n<p><a href=\"https:\/\/www.estrategiaconcursos.com.br\/professor\/eduardo-mocellin-2280\/\"><strong>Prof. Eduardo Mocellin<\/strong><\/a><\/p>\n\n\n\n<p><strong>Instagram<\/strong>:&nbsp;<a href=\"https:\/\/www.instagram.com\/edu.mocellin\"><strong>@edu.mocellin<\/strong><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Fala, pessoal! Sou o Eduardo Mocellin, professor de Matem\u00e1tica e de Racioc\u00ednio L\u00f3gico do Estrat\u00e9gia Concursos. Neste artigo, disponibilizo o gabarito extraoficial da disciplina de Matem\u00e1tica e Racioc\u00ednio L\u00f3gico da prova da PCDF de 2021 para o cargo de Agente. Ressalto que a ordem das quest\u00f5es pode variar de acordo com cada modelo de prova. [&hellip;]<\/p>\n","protected":false},"author":2051,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"post_tipo":"article","footnotes":""},"categories":[1],"tags":[],"tax_estado":[],"class_list":["post-842822","post","type-post","status-publish","format-standard","hentry","category-cursos-e-concursos"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.2 (Yoast SEO v27.2) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Gabarito Extraoficial PCDF (Agente): Matem\u00e1tica e Racioc\u00ednio L\u00f3gico.<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.estrategiaconcursos.com.br\/blog\/gabarito-extraoficial-pcdf-agente-matematica-e-raciocinio-logico\/\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Gabarito Extraoficial PCDF (Agente): Matem\u00e1tica e Racioc\u00ednio L\u00f3gico.\" \/>\n<meta property=\"og:description\" content=\"Fala, pessoal! 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