{"id":25554,"date":"2021-12-24T17:17:47","date_gmt":"2021-12-24T10:17:47","guid":{"rendered":"https:\/\/www.vietlearn.org\/post\/?p=25554"},"modified":"2021-12-24T17:17:48","modified_gmt":"2021-12-24T10:17:48","slug":"bai-so-23-do-vui-luyen-tri-thong-minh","status":"publish","type":"post","link":"https:\/\/www.vietlearn.org\/kien-thuc\/bai-so-23-do-vui-luyen-tri-thong-minh\/","title":{"rendered":"B\u00c0I S\u1ed0 23 – \u0110\u1ed1 vui luy\u1ec7n tr\u00ed th\u00f4ng minh"},"content":{"rendered":"

<\/a>C\u00c2U 1:<\/h3>\n

Cho h\u00ecnh vu\u00f4ng 5 x 5 v\u00e0 con m\u00e3 \u0111\u1eb7t \u1edf g\u00f3c nh\u01b0 h\u00ecnh v\u1ebd.<\/p>\n

B\u1ea1n h\u00e3y \u0111i con m\u00e3 (nh\u01b0 n\u01b0\u1edbc \u0111i c\u1ee7a con m\u00e3 trong c\u1edd vua) sao cho h\u1ebft l\u01b0\u1ee3t c\u00e1c \u00f4 vu\u00f4ng nh\u1ecf trong h\u00ecnh vu\u00f4ng, m\u1ed7i \u00f4 ch\u1ec9 \u0111i m\u1ed9t l\u01b0\u1ee3t.<\/p>\n

\"44.jpg\"<\/p>\n

<\/a>C\u00c2U 2:<\/h3>\n

T\u00ecm 1 s\u1ed1 t\u1ef1 nhi\u00ean, bi\u1ebft r\u1eb1ng t\u1ed5ng c\u1ee7a n\u00f3 v\u00e0 c\u00e1c ch\u1eef s\u1ed1 c\u1ee7a n\u00f3 b\u1eb1ng 2359.<\/p>\n

<\/a>C\u00c2U 3:<\/h3>\n

Trong m\u1ed9t ng\u00e0y m\u1ed9t \u0111\u00eam, kim ph\u00fat v\u00e0 kim gi\u1edd g\u1eb7p nhau m\u1ea5y l\u1ea7n?<\/p>\n

<\/a>C\u00c2U 4:<\/h3>\n

V\u00e0o m\u00f9a xu\u00e2n hoa c\u1ecf m\u1ecdc t\u01b0\u01a1i t\u1ed1t, 1 con b\u00f2 m\u1eb9 v\u00e0 7 con b\u00f2 con \u0111i \u0103n c\u1ecf. Ch\u00fang \u0103n no n\u00ea xong, b\u00f2 m\u1eb9 b\u1ea3o: \u201c9 m\u1eb9 con m\u00ecnh v\u1ec1 th\u00f4i \u0111\u1eebng \u0103n n\u1eefa k\u1ebbo mu\u1ed9n\u201d. T\u1ea1i sao b\u00f2 m\u1eb9 l\u1ea1i k\u00eau l\u00e0 9 m\u00e0 khi \u0111\u00f3 ch\u1ec9 c\u00f3 8 con b\u00f2?<\/p>\n

<\/a>C\u00c2U 5:<\/h3>\n

C\u00f3 1 c\u00e1i th\u00f9ng, b\u00ean trong c\u00f3 3 h\u0169 d\u00f9ng \u0111\u1ef1ng v\u00e0ng v\u00e0 1 t\u1edd gi\u1ea5y c\u00f3 n\u1ed9i dung nh\u01b0 sau: “Trong 3 h\u0169 n\u00e0y ch\u1ec9 c\u00f3 1 h\u0169 c\u00f3 v\u00e0ng c\u00f2n hai h\u0169 kia kh\u00f4ng c\u00f3. Ba d\u00f2ng ch\u1eef tr\u00ean 3 h\u0169 ch\u1ec9 c\u00f3 1 c\u00e2u l\u00e0 \u0111\u00fang”.<\/p>\n

Tr\u00ean c\u00e1c h\u0169 c\u00f3 ghi nh\u01b0 sau:<\/p>\n

H\u0169 v\u00e0ng th\u1ee9 1 c\u00f3 \u0111\u1ec1 ch\u1eef b\u00ean ngo\u00e0i l\u00e0: h\u0169 th\u1ee9 2 c\u00f3 v\u00e0ng.<\/p>\n

H\u0169 v\u00e0ng th\u1ee9 2 c\u00f3 \u0111\u1ec1 ch\u1eef b\u00ean ngo\u00e0i l\u00e0: h\u0169 th\u1ee9 1 c\u00f3 v\u00e0ng, h\u0169 th\u1ee9 3 kh\u00f4ng c\u00f3 v\u00e0ng.<\/p>\n

H\u0169 v\u00e0ng th\u1ee9 3 c\u00f3 \u0111\u1ec1 ch\u1eef b\u00ean ngo\u00e0i l\u00e0: v\u00e0ng kh\u00f4ng c\u00f3 trong h\u0169 th\u1ee9 1 v\u00e0 th\u1ee9 2. V\u1eady h\u0169 n\u00e0o c\u00f3 v\u00e0ng?<\/p>\n

H\u01af\u1edaNG D\u1eaaN – B\u00c0I GI\u1ea2I – \u0110\u00c1P S\u1ed0<\/h1>\n

<\/a>B\u00c0I S\u1ed0 23<\/h2>\n

<\/a>C\u00c2U 1:<\/h3>\n

C\u00f3 nhi\u1ec1u c\u00e1ch d\u1eaft ng\u1ef1a \u0111i h\u1ebft c\u00e1c l\u01b0\u1ee3t c\u00e1c \u00f4 vu\u00f4ng nh\u1ecf trong h\u00ecnh vu\u00f4ng, m\u1ed7i \u00f4 ch\u1ec9 \u0111i \u0111\u1ebfn m\u1ed9t l\u1ea7n. \u0110\u00e1nh s\u1ed1 th\u1ee9 t\u1ef1 v\u00e0o t\u1eebng v\u1ecb tr\u00ed n\u01a1i con m\u00e3 \u0111\u1ee9ng, b\u1eaft \u0111\u1ea7u t\u1eeb v\u1ecb tr\u00ed s\u1ed1 1 \u0111\u1ebfn v\u1ecb tr\u00ed cu\u1ed1i c\u00f9ng l\u00e0 s\u1ed1 25. Xin n\u00eau m\u1ed9t c\u00e1ch gi\u1ea3i nh\u01b0 h\u00ecnh v\u1ebd sau:<\/p>\n

\"146.jpg\"<\/p>\n

<\/a>C\u00c2U 2:<\/h3>\n

\u0110\u00e1p s\u1ed1: S\u1ed1 t\u1ef1 nhi\u00ean \u0111\u00f3 l\u00e0: 2345<\/p>\n

V\u00ec ta nh\u1eadn th\u1ea5y: C\u00e1c s\u1ed1 c\u1ee7a s\u1ed1 t\u1ef1 nhi\u00ean 2345 l\u00e0 ch\u1eef s\u1ed1 2, 3, 4, 5.<\/p>\n

Ta t\u00ednh t\u1ed5ng c\u1ee7a s\u1ed1 t\u1ef1 nhi\u00ean 2345 v\u00e0 c\u00e1c ch\u1eef s\u1ed1 c\u1ee7a n\u00f3 2345 + 2 + 3 + 4 + 5 = 2359<\/p>\n

V\u1eady t\u1ed5ng c\u1ee7a s\u1ed1 t\u1ef1 nhi\u00ean 2345 v\u00e0 c\u00e1c ch\u1eef s\u1ed1 c\u1ee7a n\u00f3 l\u00e0 2359<\/p>\n

<\/a>C\u00c2U 3:<\/h3>\n

M\u1ed7i 1h l\u00e0 1 l\u1ea7n kim ph\u00fat tr\u00f9ng kim gi\u1edd: 1h, 2h, 3h, 4h… \u2260 24h. Song ch\u1ec9 c\u00f3 22 l\u1ea7n v\u00ec l\u00fac 0h00 v\u00e0 24h00 th\u00ec tr\u00f9ng v\u1edbi ng\u00e0y h\u00f4m tr\u01b0\u1edbc.<\/p>\n

<\/a>C\u00c2U 4:<\/h3>\n

B\u00e0i gi\u1ea3i:<\/p>\n

B\u00f2 kh\u00f4ng bi\u1ebft \u0111\u1ebfm n\u00ean b\u00f2 m\u1eb9 n\u00f3i sai r\u1ed3i!<\/p>\n

<\/a>C\u00c2U 5:<\/h3>\n

B\u00e0i gi\u1ea3i:<\/p>\n

N\u1ebfu t\u1edd gi\u1ea5y ngo\u00e0i h\u0169 th\u1ee9 3 vi\u1ebft \u0111\u00fang th\u00ec h\u0169 \u0111\u00f3 ch\u1ee9a v\u00e0ng, n\u00ean t\u1edd gi\u1ea5y ngo\u00e0i h\u0169 th\u1ee9 1 v\u00e0 th\u1ee9 2 \u0111i\u1ec1u sai => m\u00e2u thu\u1eabn.<\/p>\n

Do \u0111\u00f3 v\u00e0ng 1 ch\u1ee9a trong h\u0169 th\u1ee9 1 ho\u1eb7c th\u1ee9 2. T\u1ee9c l\u00e0 v\u00e0ng kh\u00f4ng ch\u1ee9a trong h\u0169 th\u1ee9 3 => t\u1edd gi\u1ea5y ngo\u00e0i h\u0169 th\u1ee9 2 vi\u1ebft \u0111\u00fang. Do \u0111\u00f3 h\u0169 th\u1ee9 1 ch\u1ee9a v\u00e0ng v\u00e0 t\u1edd gi\u1ea5y ngo\u00e0i h\u0169 th\u1ee9 1 vi\u1ebft sai!<\/p>\n","protected":false},"excerpt":{"rendered":"

C\u00c2U 1: Cho h\u00ecnh vu\u00f4ng 5 x 5 v\u00e0 con m\u00e3 \u0111\u1eb7t \u1edf g\u00f3c nh\u01b0 h\u00ecnh v\u1ebd. B\u1ea1n h\u00e3y \u0111i con m\u00e3 (nh\u01b0 n\u01b0\u1edbc \u0111i c\u1ee7a con m\u00e3 trong c\u1edd vua) sao cho h\u1ebft l\u01b0\u1ee3t c\u00e1c \u00f4 vu\u00f4ng nh\u1ecf trong h\u00ecnh vu\u00f4ng, m\u1ed7i \u00f4 ch\u1ec9 \u0111i m\u1ed9t l\u01b0\u1ee3t. C\u00c2U 2: T\u00ecm 1 s\u1ed1 t\u1ef1 nhi\u00ean, […]<\/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-25554","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\/25554","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=25554"}],"version-history":[{"count":1,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/25554\/revisions"}],"predecessor-version":[{"id":25557,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/25554\/revisions\/25557"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=25554"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=25554"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=25554"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}