{"id":25496,"date":"2021-12-24T17:01:02","date_gmt":"2021-12-24T10:01:02","guid":{"rendered":"https:\/\/www.vietlearn.org\/post\/?p=25496"},"modified":"2021-12-24T17:01:03","modified_gmt":"2021-12-24T10:01:03","slug":"bai-so-11-do-vui-luyen-tri-thong-minh","status":"publish","type":"post","link":"https:\/\/www.vietlearn.org\/kien-thuc\/bai-so-11-do-vui-luyen-tri-thong-minh\/","title":{"rendered":"B\u00c0I S\u1ed0 11 &#8211; \u0110\u1ed1 vui luy\u1ec7n tr\u00ed th\u00f4ng minh"},"content":{"rendered":"<h3><a id=\"post-25496-CAU_1_10\"><\/a>C\u00c2U 1:<\/h3>\n<p>H\u00ecnh n\u00e0o trong 4 h\u00ecnh ph\u00eda d\u01b0\u1edbi ph\u1ea3i \u0111i\u1ec1n v\u00e0o \u00f4 tr\u1ed1ng \u0111\u1ec3 h\u1ee3p l\u00f4gic?<\/p>\n<p><img fetchpriority=\"high\" decoding=\"async\" width=\"578\" height=\"344\" class=\"wp-image-25497\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/24-jpg.jpeg\" alt=\"24.jpg\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/24-jpg.jpeg 578w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/24-jpg-300x179.jpeg 300w\" sizes=\"(max-width: 578px) 100vw, 578px\" \/><\/p>\n<h3><a id=\"post-25496-CAU_2_10\"><\/a>C\u00c2U 2:<\/h3>\n<p>C\u00f3 13 h\u00f2n bi, trong \u0111\u00f3 c\u00f3 01 h\u00f2n bi c\u00f3 tr\u1ecdng l\u01b0\u1ee3ng kh\u00e1c v\u1edbi c\u00e1c h\u00f2n bi c\u00f2n l\u1ea1i. H\u00e3y x\u00e1c \u0111\u1ecbnh h\u00f2n bi \u0111\u00f3 ch\u1ec9 trong 3 l\u1ea7n c\u00e2n (c\u00e2n hai \u0111\u0129a).<\/p>\n<p>L\u01b0u \u00fd: H\u00f2n bi n\u00e0y ch\u01b0a bi\u1ebft n\u1eb7ng hay nh\u1eb9 h\u01a1n c\u00e1c h\u00f2n bi kh\u00e1c.<\/p>\n<h3><a id=\"post-25496-CAU_3_10\"><\/a>C\u00c2U 3:<\/h3>\n<p>Chia \u0111\u1ec1u 100 quy\u1ec3n v\u1edf<\/p>\n<p>Th\u01b0\u1edfng 12 n\u1eef, 8 nam<\/p>\n<p>M\u1ed7i b\u1ea1n h\u1ecdc gi\u1ecfi, si\u00eang l\u00e0m<\/p>\n<p>\u0110\u01b0\u1ee3c m\u1ea5y quy\u1ec3n v\u1edf, mau tham kh\u1ea3o li\u1ec1n?<\/p>\n<p>\u0110\u1ed1 nhi \u0111\u1ed3ng, \u0111\u1ed1 thi\u1ebfu ni\u00ean<\/p>\n<p>Em ngoan thi v\u1edbi b\u1ea1n hi\u1ec1n \u0111\u00e1p \u0111i.<\/p>\n<h3><a id=\"post-25496-CAU_4_8\"><\/a>C\u00c2U 4:<\/h3>\n<p>Andy lu\u00f4n n\u00f3i d\u1ed1i v\u00e0o ng\u00e0y th\u1ee9 4, th\u1ee9 5, th\u1ee9 6 nh\u01b0ng lu\u00f4n lu\u00f4n trung th\u1ef1c v\u00e0o nh\u1eefng ng\u00e0y c\u00f2n l\u1ea1i c\u1ee7a tu\u1ea7n l\u1ec5. Trong khi \u0111\u00f3 David lu\u00f4n n\u00f3i d\u1ed1i v\u00e0o th\u1ee9 7, ch\u1ee7 nh\u1eadt, th\u1ee9 2 nh\u01b0ng lu\u00f4n trung th\u1ef1c v\u00e0o nh\u1eefng ng\u00e0y c\u00f2n l\u1ea1i c\u1ee7a tu\u1ea7n l\u1ec5.<\/p>\n<p>M\u1ed9t ng\u00e0y n\u00e0o \u0111\u00f3 c\u1ea3 hai ng\u01b0\u1eddi c\u00f9ng n\u00f3i: \u201ch\u00f4m qua t\u00f4i \u0111\u00e3 n\u00f3i d\u1ed1i\u201d. Theo c\u00e1c b\u1ea1n \u0111\u00f3 l\u00e0 th\u1ee9 m\u1ea5y trong tu\u1ea7n?<\/p>\n<h1>H\u01af\u1edaNG D\u1eaaN &#8211; B\u00c0I GI\u1ea2I &#8211; \u0110\u00c1P S\u1ed0<\/h1>\n<h2><a id=\"post-25496-BAI_SO_11_1\"><\/a>B\u00c0I S\u1ed0 11<\/h2>\n<h3><a id=\"post-25496-CAU_1_50\"><\/a>C\u00c2U 1:<\/h3>\n<p>\u00d4 n\u00e0o c\u0169ng c\u00f3 2 h\u00ecnh gi\u1ed1ng nhau nh\u01b0ng m\u1ed9t h\u00ecnh m\u00e0u tr\u1eafng v\u00e0 m\u1ed9t h\u00ecnh m\u00e0u \u0111\u1eadm n\u00ean h\u00ecnh 4 \u0111i\u1ec1n v\u00e0o \u00f4 tr\u1ed1ng l\u00e0 h\u1ee3p l\u00f4gic.<\/p>\n<p><img decoding=\"async\" width=\"568\" height=\"344\" class=\"wp-image-25498\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/119-jpg.jpeg\" alt=\"119.jpg\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/119-jpg.jpeg 568w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/119-jpg-300x182.jpeg 300w\" sizes=\"(max-width: 568px) 100vw, 568px\" \/><\/p>\n<h3><a id=\"post-25496-CAU_2_49\"><\/a>C\u00c2U 2:<\/h3>\n<p>L\u1ea7n c\u00e2n th\u1ee9 nh\u1ea5t: \u0111\u1eb7t m\u1ed7i b\u00ean \u0111\u0129a c\u00e2n 4 h\u00f2n bi.<\/p>\n<ul>\n<li>N\u1ebfu c\u00e2n kh\u00f4ng th\u0103ng b\u1eb1ng:<\/li>\n<\/ul>\n<p>&#8211; G\u1ecdi 4 h\u00f2n bi b\u00ean n\u1eb7ng l\u00e0 1, 2, 3, 4.<\/p>\n<p>4 h\u00f2n bi b\u00ean nh\u1eb9 l\u00e0 5, 6, 7, 8.<\/p>\n<p>&#8211; 5 h\u00f2n bi \u1edf ngo\u00e0i s\u1ebd l\u00e0 nh\u1eefng h\u00f2n bi chu\u1ea9n, g\u1ecdi l\u00e0 9, 10, 11, 12, 13<\/p>\n<p>&#8211; \u0110em c\u00e2n l\u1ea7n 2: L\u1ea5y c\u00e1c h\u00f2n bi 1, 2, 3, 5, 6 c\u00e2n v\u1edbi c\u00e1c h\u00f2n bi 4, 9, 10, 11, 12<\/p>\n<p>+ N\u1ebfu kh\u1ed1i l\u01b0\u1ee3ng c\u1ee7a c\u00e1c h\u00f2n bi:<\/p>\n<p>1+ 2+ 3+ 5 + 6 &lt; 4+ 9 + 10 + 11 + 12<\/p>\n<p>=&gt; H\u00f2n bi c\u1ea7n t\u00ecm l\u00e0 1 trong s\u1ed1 3 h\u00f2n bi sau: h\u00f2n bi 4 (n\u1eb7ng h\u01a1n), h\u00f2n bi 5 (nh\u1eb9 h\u01a1n), h\u00f2n bi 6 (nh\u1eb9 h\u01a1n).<\/p>\n<p>H\u00f2n bi c\u1ea7n t\u00ecm kh\u00f4ng th\u1ec3 n\u1eb1m trong c\u00e1c h\u00f2n bi 1, 2, 3 v\u00ec \u1edf l\u1ea7n c\u00e2n 1 ch\u00fang n\u1eb1m \u1edf b\u00ean n\u1eb7ng, l\u1ea7n c\u00e2n 2 n\u1eb1m \u1edf b\u00ean nh\u1eb9.<\/p>\n<p>C\u00e2n 2 h\u00f2n bi 5 v\u00e0 6<\/p>\n<p>+ N\u1ebfu kh\u1ed1i l\u01b0\u1ee3ng l\u00e0:<\/p>\n<p>&#8211; 5 = 6 =&gt; H\u00f2n bi c\u1ea7n t\u00ecm l\u00e0 h\u00f2n bi 4<\/p>\n<p>&#8211; 5 &lt; 6 =&gt; H\u00f2n bi c\u1ea7n t\u00ecm l\u00e0 h\u00f2n bi 5<\/p>\n<p>&#8211; 5 &gt; 6 =&gt; H\u00f2n bi c\u1ea7n t\u00ecm l\u00e0 h\u00f2n bi 6<\/p>\n<p>+ N\u1ebfu kh\u1ed1i l\u01b0\u1ee3ng c\u1ee7a c\u00e1c h\u00f2n bi<\/p>\n<p>1+ 2 + 3+ 5 + 6 = 4 + 9 + 10 + 11 + 12 (c\u00e2n th\u0103ng b\u1eb1ng)<\/p>\n<p>=&gt; H\u00f2n bi c\u1ea7n t\u00ecm l\u00e0 h\u00f2n bi nh\u1eb9 h\u01a1n v\u00e0 l\u00e0 1 trong s\u1ed1 2 h\u00f2n bi sau: h\u00f2n bi 7 v\u00e0 8.<\/p>\n<p>\u0110em c\u00e2n 2 h\u00f2n bi 7 v\u00e0 8, h\u00f2n bi n\u00e0o nh\u1eb9 h\u01a1n l\u00e0 h\u00f2n bi c\u1ea7n t\u00ecm.<\/p>\n<p>+ N\u1ebfu kh\u1ed1i l\u01b0\u1ee3ng c\u1ee7a c\u00e1c h\u00f2n bi:<\/p>\n<p>1+ 2+ 3+ 5 + 6 &gt; 4 + 9 + 10 + 11 + 12<\/p>\n<p>=&gt; H\u00f2n bi c\u1ea7n t\u00ecm l\u00e0 h\u00f2n bi n\u1eb7ng h\u01a1n trong s\u1ed1 3 h\u00f2n bi sau: h\u00f2n bi 1, 2, v\u00e0 3<\/p>\n<p>H\u00f2n bi c\u1ea7n t\u00ecm kh\u00f4ng th\u1ec3 l\u00e0 c\u00e1c h\u00f2n bi 4, 5 v\u00e0 6 v\u00ec trong 2 l\u1ea7n c\u00e2n tr\u00ean, m\u1ed9t l\u1ea7n ch\u00fang \u1edf b\u00ean n\u1eb7ng, m\u1ed9t l\u1ea7n \u1edf b\u00ean nh\u1eb9.<\/p>\n<p>&#8211; C\u00e2n 2 h\u00f2n bi 1 v\u00e0 2<\/p>\n<p>+ N\u1ebfu kh\u1ed1i l\u01b0\u1ee3ng l\u00e0:<\/p>\n<p>&#8211; 1 &gt; 2 =&gt; H\u00f2n bi c\u1ea7n t\u00ecm l\u00e0 h\u00f2n bi 1<\/p>\n<p>&#8211; 1 &lt; 2 =&gt; H\u00f2n bi c\u1ea7n t\u00ecm l\u00e0 h\u00f2n bi 2<\/p>\n<p>&#8211; 1 = 2 =&gt; H\u00f2n bi c\u1ea7n t\u00ecm l\u00e0 h\u00f2n bi 3<\/p>\n<ul>\n<li>N\u1ebfu c\u00e2n th\u0103ng b\u1eb1ng th\u00ec kh\u1ed1i l\u01b0\u1ee3ng c\u1ee7a c\u00e1c h\u00f2n bi:<\/li>\n<\/ul>\n<p>1+ 2 + 3+ 4 = 5 + 6 + 7 + 8<\/p>\n<p>=&gt; H\u00f2n bi c\u1ea7n t\u00ecm n\u1eb1m trong s\u1ed1 5 h\u00f2n bi 9, 10, 11, 12, 13<\/p>\n<p>&#8211; \u0110em c\u00e2n l\u1ea7n 2: L\u1ea5y c\u00e1c h\u00f2n bi 1, 2, 3 c\u00e2n v\u1edbi c\u00e1c h\u00f2n bi 9, 10, 11<\/p>\n<p>+ N\u1ebfu kh\u1ed1i l\u01b0\u1ee3ng c\u00e1c h\u00f2n bi:<\/p>\n<p>1+ 2 + 3 = 9 + 10 + 11 (c\u00e2n th\u0103ng b\u1eb1ng)<\/p>\n<p>=&gt; H\u00f2n bi c\u1ea7n t\u00ecm l\u00e0 h\u00f2n bi 12 ho\u1eb7c 13<\/p>\n<p>&#8211; C\u00e2n 2 h\u00f2n bi 11 v\u00e0 12<\/p>\n<p>+ C\u00e2n kh\u00f4ng th\u0103ng b\u1eb1ng th\u00ec kh\u1ed1i l\u01b0\u1ee3ng 2 h\u00f2n bi: 1 \u2260 12<\/p>\n<p>=&gt; H\u00f2n bi c\u1ea7n t\u00ecm l\u00e0 h\u00f2n bi 12.<\/p>\n<p>+ C\u00e2n th\u0103ng b\u1eb1ng th\u00ec kh\u1ed1i l\u01b0\u1ee3ng 2 h\u00f2n bi: 1 = 12<\/p>\n<p>=&gt; H\u00f2n bi c\u1ea7n t\u00ecm l\u00e0 h\u00f2n bi 13.<\/p>\n<p>+ N\u1ebfu kh\u1ed1i l\u01b0\u1ee3ng c\u1ee7a c\u00e1c h\u00f2n bi<\/p>\n<p>&#8211; 1 + 2 + 3 &gt; 9 + 10 + 11<\/p>\n<p>=&gt; H\u00f2n bi c\u1ea7n t\u00ecm l\u00e0 h\u00f2n bi nh\u1eb9 h\u01a1n n\u1eb1m trong s\u1ed1 c\u00e1c h\u00f2n bi 9, 10 v\u00e0 11.<\/p>\n<p>&#8211; C\u00e2n 2 h\u00f2n bi 9 v\u00e0 10<\/p>\n<p>+ N\u1ebfu kh\u1ed1i l\u01b0\u1ee3ng l\u00e0:<\/p>\n<p>&#8211; 9 &lt; 10 =&gt; H\u00f2n bi c\u1ea7n t\u00ecm l\u00e0 h\u00f2n bi 9<\/p>\n<p>&#8211; 9 &gt; 10 =&gt; H\u00f2n bi c\u1ea7n t\u00ecm l\u00e0 h\u00f2n bi 10<\/p>\n<p>&#8211; 9 = 10 =&gt; H\u00f2n bi c\u1ea7n t\u00ecm l\u00e0 h\u00f2n bi 11<\/p>\n<p>+ N\u1ebfu kh\u1ed1i l\u01b0\u1ee3ng c\u1ee7a c\u00e1c h\u00f2n bi:<\/p>\n<p>1 + 2 + 3 &lt; 9 + 10 + 11<\/p>\n<p>=&gt; H\u00f2n bi c\u1ea7n t\u00ecm n\u1eb1m trong s\u1ed1 c\u00e1c h\u00f2n bi 9, 10, 11<\/p>\n<h3><a id=\"post-25496-CAU_3_50\"><\/a>C\u00c2U 3:<\/h3>\n<p>B\u00e0i gi\u1ea3i:<\/p>\n<p>T\u1ed5ng s\u1ed1 b\u1ea1n \u0111\u01b0\u1ee3c th\u01b0\u1edfng l\u00e0:<\/p>\n<p>12 + 8 = 20 (b\u1ea1n)<\/p>\n<p>S\u1ed1 v\u1edf m\u1ed7i b\u1ea1n \u0111\u01b0\u1ee3c th\u01b0\u1edfng l\u00e0:<\/p>\n<p>100 : 2 = 5 (quy\u1ec3n)<\/p>\n<p>\u0110\u00e1p s\u1ed1: 5 quy\u1ec3n v\u1edf.<\/p>\n<h3><a id=\"post-25496-CAU_4_45\"><\/a>C\u00c2U 4:<\/h3>\n<p>B\u00e0i gi\u1ea3i:<\/p>\n<p>N\u1ebfu ng\u00e0y \u0111\u00f3 l\u00e0:<\/p>\n<p>Ch\u1ee7 nh\u1eadt: David s\u1ebd n\u00f3i &#8220;H\u00f4m qua t\u00f4i n\u00f3i th\u1eadt&#8221;<\/p>\n<p>(N\u00f3i d\u1ed1i) =&gt; kh\u00f4ng \u0111\u00fang v\u1edbi gi\u1ea3 thi\u1ebft.<\/p>\n<p>Th\u1ee9 2: David s\u1ebd n\u00f3i &#8220;H\u00f4m qua t\u00f4i n\u00f3i th\u1eadt&#8221;<\/p>\n<p>(N\u00f3i d\u1ed1i) =&gt; kh\u00f4ng \u0111\u00fang v\u1edbi gi\u1ea3 thi\u1ebft.<\/p>\n<p>Th\u1ee9 3: Andy s\u1ebd n\u00f3i &#8220;H\u00f4m qua t\u00f4i n\u00f3i th\u1eadt&#8221;<\/p>\n<p>(N\u00f3i th\u1eadt) =&gt; kh\u00f4ng \u0111\u00fang v\u1edbi gi\u1ea3 thi\u1ebft.<\/p>\n<p>Th\u1ee9 4: David s\u1ebd n\u00f3i &#8220;H\u00f4m qua t\u00f4i n\u00f3i th\u1eadt&#8221;<\/p>\n<p>(N\u00f3i th\u1eadt) =&gt; kh\u00f4ng \u0111\u00fang v\u1edbi gi\u1ea3 thi\u1ebft.<\/p>\n<p>Th\u1ee9 5: Andy s\u1ebd n\u00f3i &#8220;H\u00f4m qua t\u00f4i n\u00f3i th\u1eadt&#8221;<\/p>\n<p>(N\u00f3i d\u1ed1i. Th\u1eadt s\u1ef1, h\u00f4m th\u1ee9 4, Andy n\u00f3i d\u1ed1i)<\/p>\n<p>=&gt; kh\u00f4ng \u0111\u00fang v\u1edbi gi\u1ea3 thi\u1ebft.<\/p>\n<p>Th\u1ee9 6: David s\u1ebd n\u00f3i &#8220;H\u00f4m qua t\u00f4i n\u00f3i th\u1eadt&#8221;<\/p>\n<p>(N\u00f3i th\u1eadt) =&gt; kh\u00f4ng \u0111\u00fang v\u1edbi gi\u1ea3 thi\u1ebft.<\/p>\n<p>Th\u1ee9 7: Andy s\u1ebd n\u00f3i &#8220;H\u00f4m qua t\u00f4i n\u00f3i d\u1ed1i&#8221; (n\u00f3i th\u1eadt)<\/p>\n<p>=&gt; \u0111\u00fang v\u1edbi gi\u1ea3 thi\u1ebft.<\/p>\n<p>V\u00e0 David s\u1ebd n\u00f3i &#8220;H\u00f4m qua t\u00f4i n\u00f3i d\u1ed1i&#8221; (n\u00f3i d\u1ed1i)<\/p>\n<p>=&gt; \u0110\u00fang v\u1edbi gi\u1ea3 thi\u1ebft.<\/p>\n<p>V\u1eady \u0111\u00f3 l\u00e0 ng\u00e0y th\u1ee9 7.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>C\u00c2U 1: H\u00ecnh n\u00e0o trong 4 h\u00ecnh ph\u00eda d\u01b0\u1edbi ph\u1ea3i \u0111i\u1ec1n v\u00e0o \u00f4 tr\u1ed1ng \u0111\u1ec3 h\u1ee3p l\u00f4gic? C\u00c2U 2: C\u00f3 13 h\u00f2n bi, trong \u0111\u00f3 c\u00f3 01 h\u00f2n bi c\u00f3 tr\u1ecdng l\u01b0\u1ee3ng kh\u00e1c v\u1edbi c\u00e1c h\u00f2n bi c\u00f2n l\u1ea1i. H\u00e3y x\u00e1c \u0111\u1ecbnh h\u00f2n bi \u0111\u00f3 ch\u1ec9 trong 3 l\u1ea7n c\u00e2n (c\u00e2n hai \u0111\u0129a). L\u01b0u \u00fd: [&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-25496","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\/25496","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=25496"}],"version-history":[{"count":1,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/25496\/revisions"}],"predecessor-version":[{"id":25499,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/25496\/revisions\/25499"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=25496"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=25496"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=25496"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}