Dấu hiệu chia hết cho 2, cho 5

Home Lớp 6 Toán lớp 6 - Sách kết nối tri thức Dấu hiệu chia hết cho 2, cho 5Bài tập nâng cao

{"common":{"save":0,"post_id":"733","level":3,"total":10,"point":10,"point_extra":0},"segment":[{"id":"501","post_id":"733","mon_id":"0","chapter_id":"0","question":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","options":{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[["2"]],"list":[{"point":10,"ques":" <center><img src='img\/7.jpg' \/><\/center> <br\/> H\u00e3y ch\u1ecdn t\u1ed5ng chia h\u1ebft cho 2","select":["A. $9^7 + 12$","B. $11^7 + 7$ ","C. $8^4 + 3^4$","D. $6^{12} + 3^{12}$ "],"hint":"D\u1ef1a v\u00e0o t\u00ednh ch\u1ea5t chia h\u1ebft c\u1ee7a m\u1ed9t t\u1ed5ng v\u00e0 c\u00e1ch t\u00ecm ch\u1eef s\u1ed1 t\u1eadn c\u00f9ng c\u1ee7a m\u1ed9t l\u0169y th\u1eeba","explain":"H\u01b0\u1edbng d\u1eabn:<\/span><br\/> N\u1ebfu m\u1ecdi s\u1ed1 h\u1ea1ng trong t\u1ed5ng \u0111\u1ec1u chia h\u1ebft cho m\u1ed9t s\u1ed1 th\u00ec t\u1ed5ng chia h\u1ebft cho s\u1ed1 \u0111\u00f3 <br\/> M\u1ed9t s\u1ed1 l\u01b0u \u00fd v\u1ec1 ch\u1eef s\u1ed1 t\u1eadn c\u00f9ng c\u1ee7a m\u1ed9t l\u0169y th\u1eeba <br\/> S\u1ed1 c\u00f3 ch\u1eef s\u1ed1 t\u1eadn c\u00f9ng l\u00e0 1, 5, 6 khi n\u00e2ng l\u00ean l\u0169y th\u1eeba ch\u1eef s\u1ed1 t\u1eadn c\u00f9ng kh\u00f4ng \u0111\u1ed5i <br\/> S\u1ed1 c\u00f3 ch\u1eef s\u1ed1 t\u1eadn c\u00f9ng l\u00e0 3 khi n\u00e2ng l\u00ean l\u0169y th\u1eeba b\u1eadc 4k (k $\\in \\mathbb{N}$) th\u00ec ch\u1eef s\u1ed1 t\u1eadn c\u00f9ng l\u00e0 1 <br\/> S\u1ed1 c\u00f3 ch\u1eef s\u1ed1 t\u1eadn c\u00f9ng l\u00e0 8 khi n\u00e2ng l\u00ean l\u0169y th\u1eeba b\u1eadc 4k (k $\\in \\mathbb{N}$) th\u00ec ch\u1eef s\u1ed1 t\u1eadn c\u00f9ng l\u00e0 6 <\/span> <br\/><br\/> B\u00e0i gi\u1ea3i:<\/span> <br\/> A, $9^7$ $\\not \\vdots$ 2 ($9^7 = (9^2)^3 . 9$ m\u00e0 $9^2$ c\u00f3 ch\u1eef s\u1ed1 t\u1eadn c\u00f9ng l\u00e0 1 n\u00ean $9^7$ c\u00f3 ch\u1eef s\u1ed1 t\u1eadn c\u00f9ng l\u00e0 9) v\u00e0 12 $\\vdots$ 2 <br\/> $\\Rightarrow$ ($9^7 + 12$) $\\not \\vdots$ 2 <br\/> B, $11^7$ $\\not \\vdots$ 2 (V\u00ec $11^7$ c\u00f3 ch\u1eef s\u1ed1 t\u1eadn c\u00f9ng l\u00e0 1) v\u00e0 7 $\\not \\vdots$ 2 <br\/> Nh\u01b0ng $(11^7 + 7)$ $\\vdots$ 2 (v\u00ec ch\u1eef s\u1ed1 t\u1eadn c\u00f9ng l\u00e0 1 + 7 = 8) <br\/> C, $8^4$ $\\vdots$ 2 (v\u00ec 8 $\\vdots$ 2) <br\/> $3^4$ $\\not \\vdots$ 2 (v\u00ec $3^4$ c\u00f3 ch\u1eef s\u1ed1 t\u1eadn c\u00f9ng l\u00e0 1) <br\/> $\\Rightarrow$ $(8^4 + 3^4$) $\\not \\vdots$ 2 <br\/> D, $6^{12}$ $\\vdots$ 2 (v\u00ec 6 $\\vdots$ 2) <br\/> $3^{12}$ $\\not \\vdots$ 2 (v\u00ec $3^{12} = (3^4)^3$ m\u00e0 $3^4$ c\u00f3 ch\u1eef s\u1ed1 t\u1eadn c\u00f9ng l\u00e0 1 n\u00ean $3^{12}$ c\u00f3 ch\u1eef s\u1ed1 t\u1eadn c\u00f9ng l\u00e0 1) <br\/> $\\Rightarrow$ ($6^{12} + 3^{12})$ $\\not \\vdots$ 2 <br\/> V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: B <\/span> ","column":2}]}]},"correct":"","level":"3","hint":"","answer":"","type":"json","extra_type":"","time":"0","user_id":"0","test":"0","date":"2019-09-30 09:14:42"},{"id":"502","post_id":"733","mon_id":"0","chapter_id":"0","question":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","options":{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[["1"]],"list":[{"point":10,"ques":" <center><img src='img\/7.jpg' \/><\/center> <br\/> H\u00e3y ch\u1ecdn t\u1ed5ng chia h\u1ebft cho 5","select":["A. $25^{52} + 125$","B. $90^{12} + 21$ ","C. $10^8 + 24$","D. $121^{3} + 15$ "],"hint":"D\u1ef1a v\u00e0o t\u00ednh ch\u1ea5t chia h\u1ebft c\u1ee7a m\u1ed9t t\u1ed5ng v\u00e0 c\u00e1ch t\u00ecm ch\u1eef s\u1ed1 t\u1eadn c\u00f9ng c\u1ee7a m\u1ed9t l\u0169y th\u1eeba","explain":"H\u01b0\u1edbng d\u1eabn:<\/span><br\/> N\u1ebfu m\u1ecdi s\u1ed1 h\u1ea1ng trong t\u1ed5ng \u0111\u1ec1u chia h\u1ebft cho m\u1ed9t s\u1ed1 th\u00ec t\u1ed5ng chia h\u1ebft cho s\u1ed1 \u0111\u00f3 <br\/> M\u1ed9t s\u1ed1 l\u01b0u \u00fd v\u1ec1 ch\u1eef s\u1ed1 t\u1eadn c\u00f9ng c\u1ee7a m\u1ed9t l\u0169y th\u1eeba <br\/> S\u1ed1 c\u00f3 ch\u1eef s\u1ed1 t\u1eadn c\u00f9ng l\u00e0 1, 5, 6 khi n\u00e2ng l\u00ean l\u0169y th\u1eeba ch\u1eef s\u1ed1 t\u1eadn c\u00f9ng kh\u00f4ng \u0111\u1ed5i <br\/> S\u1ed1 c\u00f3 ch\u1eef s\u1ed1 t\u1eadn c\u00f9ng l\u00e0 3 khi n\u00e2ng l\u00ean l\u0169y th\u1eeba b\u1eadc 4k (k $\\in \\mathbb{N}$) th\u00ec ch\u1eef s\u1ed1 t\u1eadn c\u00f9ng l\u00e0 1 <br\/> S\u1ed1 c\u00f3 ch\u1eef s\u1ed1 t\u1eadn c\u00f9ng l\u00e0 8 khi n\u00e2ng l\u00ean l\u0169y th\u1eeba b\u1eadc 4k (k $\\in \\mathbb{N}$) th\u00ec ch\u1eef s\u1ed1 t\u1eadn c\u00f9ng l\u00e0 6 <\/span> <br\/><br\/> B\u00e0i gi\u1ea3i:<\/span> <br\/> A, $25^{52}$ $\\vdots$ 5 (v\u00ec 25 $\\vdots$ 5) v\u00e0 125 $\\vdots$ 5 <br\/> $\\Rightarrow$ ($25^{52} + 125$) $\\vdots$ 5 <br\/> B, $90^{12}$ $\\vdots$ 5 (v\u00ec 90 $\\vdots$ 5) v\u00e0 21 $\\not \\vdots$ 5 <br\/> $\\Rightarrow$ ($90^{12} + 21$) $\\not \\vdots$ 5 <br\/> C, $10^8$ $\\vdots$ 5 (v\u00ec 10 $\\vdots$ 5) v\u00e0 24 $\\not \\vdots$ 5 <br\/> $\\Rightarrow$ ($10^8 + 24$) $\\not \\vdots$ 5 <br\/> D, $121^3$ $\\not \\vdots$ 5 (v\u00ec 121 c\u00f3 ch\u1eef s\u1ed1 t\u1eadn c\u00f9ng l\u00e0 1) v\u00e0 15 $\\vdots$ 5 <br\/> $\\Rightarrow$ ($121^{3} + 15$) $\\not \\vdots$ 5 <br\/> V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: A <\/span> ","column":2}]}]},"correct":"","level":"3","hint":"","answer":"","type":"json","extra_type":"","time":"0","user_id":"0","test":"0","date":"2019-09-30 09:14:42"},{"id":"503","post_id":"733","mon_id":"0","chapter_id":"0","question":"\u0110i\u1ec1n t\u1eeb th\u00edch h\u1ee3p v\u00e0o ch\u1ed7 tr\u1ed1ng","options":{"time":14,"part":[{"title":"\u0110i\u1ec1n t\u1eeb th\u00edch h\u1ee3p v\u00e0o ch\u1ed7 tr\u1ed1ng","title_trans":"","temp":"fill_the_blank","correct":[[["38745"],["39173"]]],"list":[{"point":10,"width":80,"content":"","type_input":"","ques":"<center><img src='img\/2.jpg' \/><\/center> <br\/> Cho c\u00e1c s\u1ed1: 74158; 39173; 49310; 38745 <br\/> S\u1ed1 chia h\u1ebft cho 5 nh\u01b0ng kh\u00f4ng chia h\u1ebft cho 2 l\u00e0: _input_ <br\/> S\u1ed1 kh\u00f4ng chia h\u1ebft cho 2 v\u00e0 kh\u00f4ng chia h\u1ebft cho 5 l\u00e0: _input_ ","hint":"Ch\u1ecdn s\u1ed1 kh\u00f4ng chia h\u1ebft cho 2 sau \u0111\u00f3 ch\u1ecdn s\u1ed1 chia h\u1ebft cho 5, v\u00e0 ch\u1ecdn s\u1ed1 kh\u00f4ng chia h\u1ebft cho 5 t\u1eeb c\u00e1c s\u1ed1 v\u1eeba ch\u1ecdn","explain":"H\u01b0\u1edbng d\u1eabn:<\/span><br\/> D\u1ef1a v\u00e0o d\u1ea5u hi\u1ec7u chia h\u1ebft cho 2 v\u00e0 d\u1ea5u hi\u1ec7u chia h\u1ebft cho 5 <br\/> B\u01b0\u1edbc 1: <\/b> H\u00e3y ch\u1ecdn ra s\u1ed1 kh\u00f4ng chia h\u1ebft cho 2 t\u1eeb c\u00e1c s\u1ed1 tr\u00ean <br\/> B\u01b0\u1edbc 2: <\/b> Ch\u1ecdn s\u1ed1 chia h\u1ebft cho 5, s\u1ed1 kh\u00f4ng chia h\u1ebft cho 5 t\u1eeb c\u00e1c s\u1ed1 \u0111\u00e3 ch\u1ecdn \u1edf b\u01b0\u1edbc 1 <\/span> <br\/><br\/> B\u00e0i gi\u1ea3i:<\/span> <br\/> Ta c\u00f3: <br\/> V\u00ec nh\u1eefng s\u1ed1 c\u00f3 ch\u1eef s\u1ed1 t\u1eadn c\u00f9ng l\u00e0 0; 2; 4; 6; 8 th\u00ec chia h\u1ebft cho 2 <br\/> Trong c\u00e1c s\u1ed1 tr\u00ean s\u1ed1 kh\u00f4ng chia h\u1ebft 2 l\u00e0: 39173; 38745 <br\/> S\u1ed1 39173 c\u00f3 ch\u1eef s\u1ed1 t\u1eadn c\u00f9ng l\u00e0 3 n\u00ean 39173 $\\not \\vdots$ 5 <br\/> S\u1ed1 38745 c\u00f3 ch\u1eef s\u1ed1 t\u1eadn c\u00f9ng l\u00e0 5 n\u00ean 38745 $\\vdots$ 5 <br\/> V\u1eady s\u1ed1 kh\u00f4ng chia h\u1ebft cho 2 nh\u01b0ng chia h\u1ebft cho 5 l\u00e0 38745 <br\/> S\u1ed1 kh\u00f4ng chia h\u1ebft cho c\u1ea3 2 v\u00e0 5 l\u00e0: 39173 <br\/> V\u1eady s\u1ed1 c\u1ea7n \u0111i\u1ec1n l\u1ea7n l\u01b0\u1ee3t l\u00e0: 39173; 38745 <\/span>"}]}]},"correct":"","level":"3","hint":"","answer":"","type":"json","extra_type":"","time":"0","user_id":"0","test":"0","date":"2019-09-30 09:14:42"}]}