{"id":25494,"date":"2021-12-24T16:59:16","date_gmt":"2021-12-24T09:59:16","guid":{"rendered":"https:\/\/www.vietlearn.org\/post\/?p=25494"},"modified":"2021-12-24T16:59:17","modified_gmt":"2021-12-24T09:59:17","slug":"bai-so-10-do-vui-luyen-tri-thong-minh","status":"publish","type":"post","link":"https:\/\/www.vietlearn.org\/kien-thuc\/bai-so-10-do-vui-luyen-tri-thong-minh\/","title":{"rendered":"B\u00c0I S\u1ed0 10 &#8211; \u0110\u1ed1 vui luy\u1ec7n tr\u00ed th\u00f4ng minh"},"content":{"rendered":"<h3><a id=\"post-25494-CAU_1_9\"><\/a>C\u00c2U 1:<\/h3>\n<p>Con g\u00ec l\u00fac nh\u1ecf \u0111i b\u1eb1ng 4 ch\u00e2n, l\u1edbn l\u00ean \u0111i b\u1eb1ng 2 ch\u00e2n, l\u00fac g\u1ea7n v\u1ec1 tr\u1eddi \u0111i b\u1eb1ng 3 ch\u00e2n.<\/p>\n<h3><a id=\"post-25494-CAU_2_9\"><\/a>C\u00c2U 2:<\/h3>\n<p>T\u00ecm m\u1ed9t s\u1ed1 t\u1ef1 nhi\u00ean sao cho khi chia cho 2 d\u01b0 1, chia 3 d\u01b0 2, chia 4 d\u01b0 3, chia 5 d\u01b0 4, chia 6 d\u01b0 5, chia 7 d\u01b0 6, chia 8 d\u01b0 7, chia 9 d\u01b0 8.<\/p>\n<h3><a id=\"post-25494-CAU_3_9\"><\/a>C\u00c2U 3:<\/h3>\n<p>M\u1ed9t con ru\u1ed3i bay v\u1edbi v\u1eadn t\u1ed1c 100km\/h. C\u00f3 hai chi\u1ebfc \u00f4 t\u00f4 \u1edf hai \u0111\u1ea7u th\u00e0nh ph\u1ed1 c\u00e1ch nhau 50km. Khi hai \u00f4 t\u00f4 b\u1eaft \u0111\u1ea7u xu\u1ea5t ph\u00e1t, m\u1ed9t chi\u1ebfc \u0111i v\u1edbi v\u1eadn t\u1ed1c 20km\/h, m\u1ed9t chi\u1ebfc \u0111i v\u1edbi v\u1eadn t\u1ed1c 30km\/h (ng\u01b0\u1ee3c chi\u1ec1u nhau). Khi \u0111\u00f3 con ru\u1ed3i b\u1eaft \u0111\u1ea7u bay t\u1eeb \u0111\u1ea7u chi\u1ebfc xe n\u00e0y ch\u1ea1m v\u00e0o \u0111\u1ea7u chi\u1ebfc xe kia th\u00ec bay ng\u01b0\u1ee3c tr\u1edf l\u1ea1i. Khi ch\u1ea1m v\u00e0o \u0111\u1ea7u chi\u1ebfc th\u1ee9 1 th\u00ec l\u1ea1i bay ng\u01b0\u1ee3c tr\u1edf l\u1ea1i&#8230; C\u1ee9 nh\u01b0 th\u1ebf \u0111\u1ebfn khi hai xe g\u1eb7p nhau. H\u1ecfi trong kho\u1ea3ng th\u1eddi gian \u0111\u00f3 con ru\u1ed3i bay \u0111\u01b0\u1ee3c bao nhi\u00eau km?<\/p>\n<h1>H\u01af\u1edaNG D\u1eaaN &#8211; B\u00c0I GI\u1ea2I &#8211; \u0110\u00c1P S\u1ed0<\/h1>\n<h2><a id=\"post-25494-BAI_SO_10_1\"><\/a>B\u00c0I S\u1ed0 10<\/h2>\n<h3><a id=\"post-25494-CAU_1_49\"><\/a>C\u00c2U 1:<\/h3>\n<p>\u0110\u00e1p s\u1ed1: L\u00e0 con ng\u01b0\u1eddi<\/p>\n<ul>\n<li>Giai \u0111o\u1ea1n \u0111\u1ea7u: L\u00e0 em b\u00e9 n\u00ean ch\u1ec9 bi\u1ebft b\u00f2 b\u1eb1ng 4 ch\u00e2n.<\/li>\n<li>Giai \u0111o\u1ea1n 2: L\u1edbn l\u00ean t\u1ea5t nhi\u00ean l\u00e0 \u0111i b\u1eb1ng 2 ch\u00e2n.<\/li>\n<li>Giai \u0111oan 3: gi\u00e0 r\u1ed3i ph\u1ea3i ch\u1ed1ng th\u00eam g\u1eady n\u00ean tr\u1edf th\u00e0nh 3 ch\u00e2n.<\/li>\n<\/ul>\n<h3><a id=\"post-25494-CAU_2_48\"><\/a>C\u00c2U 2:<\/h3>\n<p>B\u00e0i gi\u1ea3i: Ta c\u00f3:<\/p>\n<p>n + 1 chia h\u1ebft cho 2, 3, 4, 5, 6, 7, 8, 9<\/p>\n<p>=&gt; n + 1= bcnn (2, 3, 4, 5, 6, 7, 8, 9)= 9 x 8 x 7 x 5 = 2520<\/p>\n<p>=&gt; n = 2519<\/p>\n<h3><a id=\"post-25494-CAU_3_49\"><\/a>C\u00c2U 3:<\/h3>\n<p>\u0110\u00e1p s\u1ed1: con ru\u1ed3i bay \u0111\u01b0\u1ee3c 100km.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>C\u00c2U 1: Con g\u00ec l\u00fac nh\u1ecf \u0111i b\u1eb1ng 4 ch\u00e2n, l\u1edbn l\u00ean \u0111i b\u1eb1ng 2 ch\u00e2n, l\u00fac g\u1ea7n v\u1ec1 tr\u1eddi \u0111i b\u1eb1ng 3 ch\u00e2n. C\u00c2U 2: T\u00ecm m\u1ed9t s\u1ed1 t\u1ef1 nhi\u00ean sao cho khi chia cho 2 d\u01b0 1, chia 3 d\u01b0 2, chia 4 d\u01b0 3, chia 5 d\u01b0 4, chia 6 d\u01b0 5, [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_disable_autopaging":false},"categories":[47],"tags":[],"class_list":["post-25494","post","type-post","status-publish","format-standard","hentry","category-do-vui"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/25494","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/comments?post=25494"}],"version-history":[{"count":1,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/25494\/revisions"}],"predecessor-version":[{"id":25495,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/25494\/revisions\/25495"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=25494"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=25494"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=25494"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}