{"segment":[{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[["3"]],"list":[{"point":5,"ques":" <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/daiso/bai11/lv2/img\/2.jpg' \/><\/center> <br\/> Cho c\u00e1c s\u1ed1: 914208; 374192; 35496; 31205. <br\/>T\u1eadp h\u1ee3p A g\u1ed3m c\u00e1c s\u1ed1 chia h\u1ebft cho 3 l\u00e0:","select":["A. A = {914208; 31205}","B. A = {374192; 35496} ","C. A = {914208; 35496}"],"hint":"T\u00ednh t\u1ed5ng c\u00e1c ch\u1eef s\u1ed1 c\u1ee7a t\u1eebng s\u1ed1 \u0111\u1ec3 t\u00ecm c\u00e1c s\u1ed1 chia h\u1ebft cho 3","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span> <br\/> D\u1ef1a v\u00e0o d\u1ea5u hi\u1ec7u chia h\u1ebft cho 3 <br\/> <b> B\u01b0\u1edbc 1: <\/b> T\u00ednh t\u1ed5ng c\u00e1c ch\u1eef s\u1ed1 c\u1ee7a t\u1eebng s\u1ed1 <br\/> S\u1ed1 n\u00e0o c\u00f3 t\u1ed5ng c\u00e1c ch\u1eef s\u1ed1 chia h\u1ebft cho 3 th\u00ec chia h\u1ebft cho 3 <br\/> <b> B\u01b0\u1edbc 2: <\/b> T\u00ecm t\u1eadp h\u1ee3p A g\u1ed3m t\u1ea5t c\u1ea3 c\u00e1c s\u1ed1 chia h\u1ebft cho 3 <\/span> <br\/><br\/> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span> <br\/> +) S\u1ed1 914208 c\u00f3 t\u1ed5ng c\u00e1c ch\u1eef s\u1ed1 l\u00e0: 9 + 1 + 4 + 2 + 0 + 8 = 24 <br\/> V\u00ec 24 $\\vdots$ 3 $\\Rightarrow$ 914208 $\\vdots$ 3 <br\/> +) S\u1ed1 374192 c\u00f3 t\u1ed5ng c\u00e1c ch\u1eef s\u1ed1 l\u00e0: 3 + 7 + 4 + 1 + 9 + 2 = 26 <br\/> V\u00ec 26 $\\not \\vdots$ 3 $\\Rightarrow$ 374192 $\\not \\vdots$ 3 <br\/> +) S\u1ed1 35496 c\u00f3 t\u1ed5ng c\u00e1c ch\u1eef s\u1ed1 l\u00e0: 3 + 5 + 4 + 9 + 6 = 27 <br\/> V\u00ec 27 $\\vdots$ 3 $\\Rightarrow$ 35496 $\\vdots$ 3 <br\/> +) S\u1ed1 31205 c\u00f3 t\u1ed5ng c\u00e1c ch\u1eef s\u1ed1 l\u00e0: 3 + 1 + 2 + 0 + 5 = 11 <br\/> V\u00ec 11 $\\not \\vdots$ 3 $\\Rightarrow$ 31205 $\\not \\vdots$ 3 <br\/> V\u1eady t\u1eadp h\u1ee3p A g\u1ed3m c\u00e1c s\u1ed1 chia h\u1ebft cho 3 l\u00e0: A = {914208; 35496} <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: C <\/span> ","column":3}]}],"id_ques":531},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[["3"]],"list":[{"point":5,"ques":" <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/daiso/bai11/lv2/img\/2.jpg' \/><\/center> <br\/> Cho c\u00e1c s\u1ed1: 914208; 374192; 35496; 31205. <br\/> T\u1eadp h\u1ee3p B g\u1ed3m c\u00e1c s\u1ed1 chia h\u1ebft cho 9 l\u00e0:","select":["A. B = {914208}","B. B = {379142} ","C. B = {35496}"],"hint":"T\u00ednh t\u1ed5ng c\u00e1c ch\u1eef s\u1ed1 c\u1ee7a t\u1eebng s\u1ed1 \u0111\u1ec3 t\u00ecm c\u00e1c s\u1ed1 chia h\u1ebft cho 9","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> D\u1ef1a v\u00e0o d\u1ea5u hi\u1ec7u chia h\u1ebft cho 9 <br\/> <b> B\u01b0\u1edbc 1: <\/b> T\u00ednh t\u1ed5ng c\u00e1c ch\u1eef s\u1ed1 c\u1ee7a t\u1eebng s\u1ed1 <br\/> S\u1ed1 n\u00e0o c\u00f3 t\u1ed5ng c\u00e1c ch\u1eef s\u1ed1 chia h\u1ebft cho 9 th\u00ec chia h\u1ebft cho 9 <br\/> <b> B\u01b0\u1edbc 2: <\/b> T\u00ecm t\u1eadp h\u1ee3p B g\u1ed3m t\u1ea5t c\u1ea3 c\u00e1c s\u1ed1 chia h\u1ebft cho 9 <\/span> <br\/><br\/> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span> <br\/> +) S\u1ed1 914208 c\u00f3 t\u1ed5ng c\u00e1c ch\u1eef s\u1ed1 l\u00e0: 9 + 1 + 4 + 2 + 0 + 8 = 24 <br\/> V\u00ec 24 $\\not \\vdots$ 9 $\\Rightarrow$ 914208 $\\not \\vdots$ 9 <br\/> +) S\u1ed1 374192 c\u00f3 t\u1ed5ng c\u00e1c ch\u1eef s\u1ed1 l\u00e0: 3 + 7 + 4 + 1 + 9 + 2 = 26 <br\/> V\u00ec 26 $\\not \\vdots$ 9 $\\Rightarrow$ 374192 $\\not \\vdots$ 9<br\/> +) S\u1ed1 35496 c\u00f3 t\u1ed5ng c\u00e1c ch\u1eef s\u1ed1 l\u00e0: 3 + 5 + 4 + 9 + 6 = 27 <br\/> V\u00ec 27 $\\vdots$ 9 $\\Rightarrow$ 35496 $\\vdots$ 9 <br\/> +) S\u1ed1 31205 c\u00f3 t\u1ed5ng c\u00e1c ch\u1eef s\u1ed1 l\u00e0: 3 + 1 + 2 + 0 + 5 = 11 <br\/> V\u00ec 11 $\\not \\vdots$ 9 $\\Rightarrow$ 31205 $\\not \\vdots$ 9 <br\/> V\u1eady t\u1eadp h\u1ee3p B g\u1ed3m c\u00e1c s\u1ed1 chia h\u1ebft cho 9 l\u00e0: B = {35496} <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: C <\/span> ","column":3}]}],"id_ques":532},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[["4"]],"list":[{"point":5,"ques":" <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/daiso/bai11/lv2/img\/3.jpg' \/><\/center> <br\/> H\u00e3y ch\u1ecdn s\u1ed1 khi chia cho 3 \u0111\u01b0\u1ee3c d\u01b0 l\u00e0 1","select":["A. 4715","B. 8324 ","C. 7421","D. 9142"],"hint":"S\u1ed1 A c\u00f3 t\u1ed5ng c\u00e1c ch\u1eef s\u1ed1 chia 3 d\u01b0 m th\u00ec A chia 3 d\u01b0 m","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> D\u1ef1a v\u00e0o d\u1ea5u hi\u1ec7u chia h\u1ebft cho 3 <br\/> <b> B\u01b0\u1edbc 1: <\/b> T\u00ednh t\u1ed5ng c\u00e1c ch\u1eef s\u1ed1 c\u1ee7a t\u1eebng s\u1ed1 <b> <br\/> B\u01b0\u1edbc 2: <\/b> N\u1ebfu t\u1ed5ng c\u00e1c ch\u1eef s\u1ed1 c\u1ee7a s\u1ed1 A chia cho 3 d\u01b0 m th\u00ec s\u1ed1 A chia 3 d\u01b0 m <\/span> <br\/><br\/> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span> <br\/> +) S\u1ed1 4715 c\u00f3 t\u1ed5ng c\u00e1c ch\u1eef s\u1ed1 l\u00e0: 4 + 7 + 1 + 5 = 17 <br\/> V\u00ec 17 = 3 . 5 + 2 n\u00ean 17 chia 3 d\u01b0 2 hay 47515 chia 3 d\u01b0 2 <br\/> +) S\u1ed1 8324 c\u00f3 t\u1ed5ng c\u00e1c ch\u1eef s\u1ed1 l\u00e0: 8 + 3 + 2 + 4 = 17 <br\/> V\u00ec 17 chia 3 d\u01b0 2 n\u00ean 8324 chia 3 d\u01b0 2 <br\/> +) S\u1ed1 7421 c\u00f3 t\u1ed5ng c\u00e1c ch\u1eef s\u1ed1 l\u00e0: 7 + 4 + 2 + 1 = 14 <br\/> V\u00ec 14 = 3 . 4 + 2 n\u00ean 14 chia 3 d\u01b0 2 hay 7421 chia 3 d\u01b0 2 <br\/> +) S\u1ed1 9142 c\u00f3 t\u1ed5ng c\u00e1c ch\u1eef s\u1ed1 l\u00e0: 9 + 1 + 4 + 2 = 16 <br\/> V\u00ec 16 = 3 . 5 + 1 n\u00ean 16 chia 3 d\u01b0 1 hay 9142 chia 3 d\u01b0 1 <br\/> <span class='basic_pink'>V\u1eady s\u1ed1 chia 3 d\u01b0 1 l\u00e0: 9142 <\/span> ","column":4}]}],"id_ques":533},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[["1"]],"list":[{"point":5,"ques":" <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/daiso/bai11/lv2/img\/3.jpg' \/><\/center> <br\/> H\u00e3y ch\u1ecdn s\u1ed1 khi chia cho 3 \u0111\u01b0\u1ee3c d\u01b0 l\u00e0 2","select":["A. 84107","B. 9214 ","C. 8367","D. 1125"],"hint":"S\u1ed1 A c\u00f3 t\u1ed5ng c\u00e1c ch\u1eef s\u1ed1 chia 3 d\u01b0 m th\u00ec A chia 3 d\u01b0 m","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> D\u1ef1a v\u00e0o d\u1ea5u hi\u1ec7u chia h\u1ebft cho 3 <br\/> <b> B\u01b0\u1edbc 1: <\/b> T\u00ednh t\u1ed5ng c\u00e1c ch\u1eef s\u1ed1 c\u1ee7a t\u1eebng s\u1ed1 <b> <br\/> B\u01b0\u1edbc 2: <\/b> N\u1ebfu t\u1ed5ng c\u00e1c ch\u1eef s\u1ed1 c\u1ee7a s\u1ed1 A chia cho 3 d\u01b0 m th\u00ec s\u1ed1 A chia 3 d\u01b0 m <\/span> <br\/><br\/> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span> <br\/> +) S\u1ed1 84107 c\u00f3 t\u1ed5ng c\u00e1c ch\u1eef s\u1ed1 l\u00e0: 8 + 4 + 1 + 0 + 7 = 20 <br\/> V\u00ec 20 = 3 . 6 + 2 n\u00ean 20 chia 3 d\u01b0 2 hay 84107 chia 3 d\u01b0 2 <br\/> +) S\u1ed1 9214 c\u00f3 t\u1ed5ng c\u00e1c ch\u1eef s\u1ed1 l\u00e0: 9 + 2 + 1 + 4 = 16 <br\/> V\u00ec 16 = 3 . 5 + 1 hay 16 chia 3 d\u01b0 1 n\u00ean 9214 chia 3 d\u01b0 1 <br\/> +) S\u1ed1 8367 c\u00f3 t\u1ed5ng c\u00e1c ch\u1eef s\u1ed1 l\u00e0: 8 + 3 + 6 + 7 = 24 <br\/> V\u00ec 24 $\\vdots$ 3 $\\Rightarrow$ 8367 $\\vdots$ 3 <br\/> +) S\u1ed1 1125 c\u00f3 t\u1ed5ng c\u00e1c ch\u1eef s\u1ed1 l\u00e0: 1 + 1 + 2 + 5 = 9 <br\/> V\u00ec 9 $\\vdots$ 3 $\\Rightarrow$ 1125 $\\vdots$ 3 <br\/> <span class='basic_pink'>V\u1eady s\u1ed1 chia 3 d\u01b0 2 l\u00e0: 84107 <\/span> ","column":4}]}],"id_ques":534},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[["2"]],"list":[{"point":5,"ques":" <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/daiso/bai11/lv2/img\/3.jpg' \/><\/center> <br\/> H\u00e3y ch\u1ecdn s\u1ed1 khi chia cho 9 \u0111\u01b0\u1ee3c d\u01b0 l\u00e0 7 ","select":["A. 4194","B. 6352 ","C. 8460","D. 7753"],"hint":"S\u1ed1 A c\u00f3 t\u1ed5ng c\u00e1c ch\u1eef s\u1ed1 chia 9 d\u01b0 m th\u00ec A chia 9 d\u01b0 m","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> D\u1ef1a v\u00e0o d\u1ea5u hi\u1ec7u chia h\u1ebft cho 9 <br\/> <b> B\u01b0\u1edbc 1: <\/b> T\u00ednh t\u1ed5ng c\u00e1c ch\u1eef s\u1ed1 c\u1ee7a t\u1eebng s\u1ed1 <b> <br\/> B\u01b0\u1edbc 2: <\/b> N\u1ebfu t\u1ed5ng c\u00e1c ch\u1eef s\u1ed1 c\u1ee7a s\u1ed1 A chia cho 9 d\u01b0 m th\u00ec s\u1ed1 A chia 9 d\u01b0 m <\/span> <br\/><br\/> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span> <br\/> +) S\u1ed1 4194 c\u00f3 t\u1ed5ng c\u00e1c ch\u1eef s\u1ed1 l\u00e0: 4 + 1 + 9 + 4 = 18 <br\/> V\u00ec 18 $\\vdots$ 9 $\\Rightarrow$ 4194 $\\vdots$ 9 <br\/> +) S\u1ed1 6352 c\u00f3 t\u1ed5ng c\u00e1c ch\u1eef s\u1ed1 l\u00e0: 6 + 3 + 5 + 2 = 16 <br\/> V\u00ec 16 = 9 + 7 n\u00ean 16 chia 9 d\u01b0 7 hay 6352 chia 9 d\u01b0 7 <br\/> +) S\u1ed1 8460 c\u00f3 t\u1ed5ng c\u00e1c ch\u1eef s\u1ed1 l\u00e0: 8 + 4 + 6 + 0 = 18 <br\/> V\u00ec 18 $\\vdots$ 9 $\\Rightarrow$ 8460 $\\vdots$ 9 <br\/> +) S\u1ed1 7753 c\u00f3 t\u1ed5ng c\u00e1c ch\u1eef s\u1ed1 l\u00e0: 7 + 7 + 5 + 3 = 22 <br\/> V\u00ec 22 = 2 . 9 + 4 n\u00ean 7753 chia 9 d\u01b0 4 hay 7753 chia 9 d\u01b0 4 <br\/> <span class='basic_pink'> V\u1eady s\u1ed1 chia 9 d\u01b0 7 l\u00e0: 6352 <\/span> ","column":4}]}],"id_ques":535},{"time":24,"part":[{"title":"\u0110i\u1ec1n t\u1eeb th\u00edch h\u1ee3p v\u00e0o ch\u1ed7 tr\u1ed1ng","title_trans":"","temp":"fill_the_blank","correct":[[["1"]]],"list":[{"point":5,"width":60,"content":"","type_input":"","ques":"<center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/daiso/bai11/lv2/img\/7.jpg' \/><\/center> <br\/> Kh\u00f4ng th\u1ef1c hi\u1ec7n ph\u00e9p chia h\u00e3y t\u00ecm d\u01b0 khi chia 1197643 cho 3. <br\/> 1197643 : 3 d\u01b0 l\u00e0: _input_ ","hint":"N\u1ebfu s\u1ed1 A c\u00f3 t\u1ed5ng c\u00e1c ch\u1eef s\u1ed1 chia 3 d\u01b0 m th\u00ec s\u1ed1 A chia 3 d\u01b0 m","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> <b> B\u01b0\u1edbc 1: <\/b> T\u00ednh t\u1ed5ng c\u00e1c ch\u1eef s\u1ed1 c\u1ee7a 1197643 <br\/> <b> B\u01b0\u1edbc 2: <\/b> X\u00e9t t\u1ed5ng c\u00e1c ch\u1eef s\u1ed1 v\u1eeba t\u00ednh \u1edf b\u01b0\u1edbc 1 <br\/> N\u1ebfu t\u1ed5ng c\u00e1c ch\u1eef s\u1ed1 c\u1ee7a 1197643 chia 3 d\u01b0 m th\u00ec 1197643 chia 3 d\u01b0 m <\/span> <br\/><br\/> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> S\u1ed1 1197643 c\u00f3 t\u1ed5ng c\u00e1c ch\u1eef s\u1ed1 l\u00e0: 1 + 1 + 9 + 7 + 6 + 4 + 3 = 31 <br\/> V\u00ec 31 = 3 . 10 + 1 n\u00ean 31 chia 3 d\u01b0 1 hay 1197643 chia 3 d\u01b0 1 <br\/> V\u1eady s\u1ed1 d\u01b0 khi chia 1197643 cho 3 l\u00e0 1 <br\/> <span class='basic_pink'> S\u1ed1 c\u1ea7n \u0111i\u1ec1n l\u00e0: 1 <\/span> <br\/> "}]}],"id_ques":536},{"time":24,"part":[{"title":"\u0110i\u1ec1n t\u1eeb th\u00edch h\u1ee3p v\u00e0o ch\u1ed7 tr\u1ed1ng","title_trans":"","temp":"fill_the_blank","correct":[[["1"]]],"list":[{"point":5,"width":60,"content":"","type_input":"","ques":"<center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/daiso/bai11/lv2/img\/7.jpg' \/><\/center> <br\/> Kh\u00f4ng th\u1ef1c hi\u1ec7n ph\u00e9p chia h\u00e3y t\u00ecm d\u01b0 khi chia 841762 cho 9. <br\/> 841762 : 9 d\u01b0 l\u00e0: _input_ ","hint":"N\u1ebfu s\u1ed1 A c\u00f3 t\u1ed5ng c\u00e1c ch\u1eef s\u1ed1 chia 9 d\u01b0 m th\u00ec s\u1ed1 A chia 9 d\u01b0 m","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> <b> B\u01b0\u1edbc 1: <\/b> T\u00ednh t\u1ed5ng c\u00e1c ch\u1eef s\u1ed1 c\u1ee7a 841762 <br\/> <b> B\u01b0\u1edbc 2: <\/b> X\u00e9t t\u1ed5ng c\u00e1c ch\u1eef s\u1ed1 v\u1eeba t\u00ednh \u1edf b\u01b0\u1edbc 1 <br\/> N\u1ebfu t\u1ed5ng c\u00e1c ch\u1eef s\u1ed1 c\u1ee7a 841762 chia 9 d\u01b0 m th\u00ec 841762 chia 9 d\u01b0 m <\/span> <br\/><br\/> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> S\u1ed1 841762 c\u00f3 t\u1ed5ng c\u00e1c ch\u1eef s\u1ed1 l\u00e0: 8 + 4 + 1 + 7 + 6 + 2 = 28 <br\/> V\u00ec 28 = 9 . 3 + 1 n\u00ean 28 chia 9 d\u01b0 1 hay 841762 chia 9 d\u01b0 1 <br\/> V\u1eady s\u1ed1 d\u01b0 khi chia 841762 cho 9 l\u00e0 1 <br\/> <span class='basic_pink'> S\u1ed1 c\u1ea7n \u0111i\u1ec1n l\u00e0: 1 <\/span> <br\/> "}]}],"id_ques":537},{"time":24,"part":[{"title":"\u0110i\u1ec1n t\u1eeb th\u00edch h\u1ee3p v\u00e0o ch\u1ed7 tr\u1ed1ng","title_trans":"","temp":"fill_the_blank","correct":[[["102"]]],"list":[{"point":5,"width":60,"content":"","type_input":"","ques":"<center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/daiso/bai11/lv2/img\/10.jpg' \/><\/center> <br\/> S\u1ed1 nh\u1ecf nh\u1ea5t c\u00f3 3 ch\u1eef s\u1ed1 kh\u00e1c nhau chia h\u1ebft cho 3 l\u00e0: _input_ ","hint":"X\u00e9t c\u00e1c s\u1ed1 c\u00f3 3 ch\u1eef s\u1ed1 t\u1eeb s\u1ed1 nh\u1ecf nh\u1ea5t","explain":" <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> X\u00e9t c\u00e1c s\u1ed1 c\u00f3 3 ch\u1eef s\u1ed1 kh\u00e1c t\u1eeb s\u1ed1 nh\u1ecf nh\u1ea5t ta c\u00f3: <br\/> S\u1ed1 102 $\\vdots$ 3 v\u00ec t\u1ed5ng c\u00e1c ch\u1eef s\u1ed1 l\u00e0 3 <br\/> <span class='basic_pink'> V\u1eady s\u1ed1 nh\u1ecf nh\u1ea5t c\u00f3 3 ch\u1eef s\u1ed1 kh\u00e1c nhau chia h\u1ebft cho 3 l\u00e0: 102 <\/span> <br\/> "}]}],"id_ques":538},{"time":24,"part":[{"title":"\u0110i\u1ec1n t\u1eeb th\u00edch h\u1ee3p v\u00e0o ch\u1ed7 tr\u1ed1ng","title_trans":"","temp":"fill_the_blank","correct":[[["981"]]],"list":[{"point":5,"width":60,"content":"","type_input":"","ques":"<center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/daiso/bai11/lv2/img\/10.jpg' \/><\/center> <br\/> S\u1ed1 l\u1edbn nh\u1ea5t c\u00f3 3 ch\u1eef s\u1ed1 kh\u00e1c nhau chia h\u1ebft cho 9 l\u00e0: _input_ ","hint":"X\u00e9t c\u00e1c s\u1ed1 c\u00f3 3 ch\u1eef s\u1ed1 kh\u00e1c nhau t\u1eeb s\u1ed1 l\u1edbn nh\u1ea5t ","explain":" <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> X\u00e9t c\u00e1c s\u1ed1 c\u00f3 3 ch\u1eef s\u1ed1 kh\u00e1c nhau t\u1eeb s\u1ed1 l\u1edbn nh\u1ea5t l\u00e0 987 <br\/> Ta th\u1ea5y c\u00f3 s\u1ed1 981 c\u00f3 t\u1ed5ng c\u00e1c ch\u1eef s\u1ed1 l\u00e0: 9 + 8 + 1 = 18 <br\/> V\u00ec 18 $\\vdots$ 9 $\\Rightarrow$ 981 $\\vdots$ 9 <br\/> <span class='basic_pink'> V\u1eady s\u1ed1 l\u1edbn nh\u1ea5t c\u00f3 3 ch\u1eef s\u1ed1 kh\u00e1c nhau chia h\u1ebft cho 9 l\u00e0: 981 <\/span> <br\/> "}]}],"id_ques":539},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[["1"]],"list":[{"point":5,"ques":" <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/daiso/bai11/lv2/img\/9.jpg' \/><\/center> <br\/> H\u00e3y ch\u1ecdn ph\u00e9p t\u00ednh n\u00e0o c\u00f3 k\u1ebft qu\u1ea3 l\u00e0 s\u1ed1 chia h\u1ebft cho 3 ","select":["A. $9^{23} + 3^{41}$","B. $12^{81} + 4$ ","C. $15^3 + 17$","D. $3 . 4921 + 25$"],"hint":"N\u1ebfu t\u1ea5t c\u1ea3 c\u00e1c s\u1ed1 h\u1ea1ng c\u1ee7a m\u1ed9t t\u1ed5ng \u0111\u1ec1u chia h\u1ebft cho c\u00f9ng m\u1ed9t s\u1ed1 th\u00ec t\u1ed5ng chia h\u00e9t cho s\u1ed1 \u0111\u00f3","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> D\u1ef1a v\u00e0o d\u1ea5u hi\u1ec7u chia h\u1ebft cho 3 v\u00e0 t\u00ednh ch\u1ea5t chia h\u1ebft c\u1ee7a m\u1ed9t t\u1ed5ng <br\/> X\u00e9t t\u1eebng s\u1ed1 h\u1ea1ng trong t\u1ed5ng \u0111\u1ec1u chia h\u1ebft cho 3 th\u00ec t\u1ed5ng chia h\u1ebft cho 3 <\/span> <br\/><br\/> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span> <br\/> +) $9^{23}$ $\\vdots$ 3 (v\u00ec 9 $\\vdots$ 3) v\u00e0 $3^{41}$ $\\vdots$ 3 (v\u00ec 3 $\\vdots$ 3) <br\/> $\\Rightarrow$ ($9^{23} + 3^{41})$ $\\vdots$ 3 <br\/> +) $12^{81}$ $\\vdots$ 3 (v\u00ec 12 $\\vdots$ 3) v\u00e0 4 $\\not \\vdots$ 3 <br\/> $\\Rightarrow$ $(12^{81} + 4)$ $\\not \\vdots$ 3 <br\/> +) $15^3$ $\\vdots$ 3 (v\u00ec 15 $\\vdots$ 3) v\u00e0 17 $\\not \\vdots$ 3 <br\/> $\\Rightarrow$ $(15^3 + 17)$ $\\not \\vdots$ 3 <br\/> +) S\u1ed1 3 . 4921 $\\vdots$ 3 (v\u00ec 3 $\\vdots$ 3) v\u00e0 25 $\\not \\vdots$ 3 <br\/> $\\Rightarrow$ ($3 . 4921 + 25)$ $\\not \\vdots$ 3 <br\/> <span class='basic_pink'> V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: A <\/span> ","column":4}]}],"id_ques":540},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[["4"]],"list":[{"point":5,"ques":" <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/daiso/bai11/lv2/img\/9.jpg' \/><\/center> <br\/> H\u00e3y ch\u1ecdn ph\u00e9p t\u00ednh n\u00e0o c\u00f3 k\u1ebft qu\u1ea3 l\u00e0 s\u1ed1 chia h\u1ebft cho 3 ","select":["A. $73149 + 32$","B. $8341 + 3^{10}$ ","C. $10^3 + 3^{10}$","D. $12.429 + 9.421$"],"hint":"N\u1ebfu t\u1ea5t c\u1ea3 c\u00e1c s\u1ed1 h\u1ea1ng c\u1ee7a m\u1ed9t t\u1ed5ng \u0111\u1ec1u chia h\u1ebft cho c\u00f9ng m\u1ed9t s\u1ed1 th\u00ec t\u1ed5ng chia h\u1ebft cho s\u1ed1 \u0111\u00f3","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> D\u1ef1a v\u00e0o d\u1ea5u hi\u1ec7u chia h\u1ebft cho 3 v\u00e0 t\u00ednh ch\u1ea5t chia h\u1ebft c\u1ee7a m\u1ed9t t\u1ed5ng <br\/> X\u00e9t t\u1eebng s\u1ed1 h\u1ea1ng trong t\u1ed5ng \u0111\u1ec1u chia h\u1ebft cho 3 th\u00ec t\u1ed5ng chia h\u1ebft cho 3 <\/span> <br\/><br\/> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span> <br\/> +) S\u1ed1 73149 c\u00f3 t\u1ed5ng c\u00e1c ch\u1eef s\u1ed1 l\u00e0: 7 + 3 + 1 + 4 + 9 = 24 <br\/> V\u00ec 24 $\\vdots$ 3 $\\Rightarrow$ 73149 $\\vdots$ 3 <br\/> V\u00e0 32 $\\not \\vdots$ 3 $\\Rightarrow$ (73149 + 32) $\\not \\vdots$ 3 <br\/> +) S\u1ed1 8341 c\u00f3 t\u1ed5ng c\u00e1c ch\u1eef s\u1ed1 l\u00e0: 8 + 3 + 4 + 1 = 16 <br\/> V\u00ec 16 $\\not \\vdots$ 3 $\\Rightarrow$ 8341 $\\not \\vdots$ 3 <br\/> $3^{10}$ $\\vdots$ 3 (v\u00ec 3 $\\vdots$ 3) <br\/> $\\Rightarrow$ ($8341 + 3^{10}$) $\\not \\vdots$ 3 <br\/> +) $10^3$ $\\not \\vdots$ 3 v\u00e0 $3^{10}$ $\\vdots$ 3 (v\u00ec 3 $\\vdots$ 3) <br\/> $\\Rightarrow$ ($10^3 + 3^{10}$) $\\not \\vdots$ 3 <br\/> +) 12 . 429 $\\vdots$ 3 (v\u00ec 12 $\\vdots$ 3) v\u00e0 9 . 421 $\\vdots$ 3 (v\u00ec 9 $\\vdots$ 3) <br\/> $\\Rightarrow$ (12 . 429 + 9. 421) $\\vdots$ 3 <br\/> <span class='basic_pink'> V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: D <\/span> ","column":2}]}],"id_ques":541},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[["4"]],"list":[{"point":5,"ques":" <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/daiso/bai11/lv2/img\/9.jpg' \/><\/center> <br\/> H\u00e3y ch\u1ecdn ph\u00e9p t\u00ednh n\u00e0o c\u00f3 k\u1ebft qu\u1ea3 l\u00e0 s\u1ed1 chia h\u1ebft cho 9 ","select":["A. $32149 + 6570$","B. $7942 + 3564$ ","C. $8210 + 9405$","D. $1908 + 3069$"],"hint":"N\u1ebfu t\u1ea5t c\u1ea3 c\u00e1c s\u1ed1 h\u1ea1ng c\u1ee7a m\u1ed9t t\u1ed5ng \u0111\u1ec1u chia h\u1ebft cho c\u00f9ng m\u1ed9t s\u1ed1 th\u00ec t\u1ed5ng chia h\u1ebft cho s\u1ed1 \u0111\u00f3","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> D\u1ef1a v\u00e0o d\u1ea5u hi\u1ec7u chia h\u1ebft cho 9 v\u00e0 t\u00ednh ch\u1ea5t chia h\u1ebft c\u1ee7a m\u1ed9t t\u1ed5ng <br\/> X\u00e9t t\u1eebng s\u1ed1 h\u1ea1ng trong t\u1ed5ng \u0111\u1ec1u chia h\u1ebft cho 9 th\u00ec t\u1ed5ng chia h\u1ebft cho 9 <\/span> <br\/><br\/> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span> <br\/> +) S\u1ed1 32149 c\u00f3 t\u1ed5ng c\u00e1c ch\u1eef s\u1ed1 l\u00e0: 3 + 2 + 1 + 4 + 9 = 19 <br\/> V\u00ec 19 $\\not \\vdots$ 9 $\\Rightarrow$ 32149 $\\not \\vdots$ 9 <br\/> S\u1ed1 6570 c\u00f3 t\u1ed5ng c\u00e1c ch\u1eef s\u1ed1 l\u00e0: 6 + 5 + 7 + 0 = 18 <br\/> V\u00ec 18 $\\vdots$ 9 $\\Rightarrow$ 6570 $\\vdots$ 9 <br\/> $\\Rightarrow$ ($32149 + 6570$) $\\not \\vdots$ 9 <br\/> +) S\u1ed1 7942 c\u00f3 t\u1ed5ng c\u00e1c ch\u1eef s\u1ed1 l\u00e0: 7 + 9 + 4 + 2 = 22 <br\/> V\u00ec 22 $\\not \\vdots$ 9 $\\Rightarrow$ 7942 $\\not \\vdots$ 9 <br\/> S\u1ed1 3564 c\u00f3 t\u1ed5ng c\u00e1c ch\u1eef s\u1ed1 l\u00e0: 3 + 5 + 6 + 4 = 18 <br\/> V\u00ec 18 $\\vdots$ 9 $\\Rightarrow$ 3564 $\\vdots$ 9 <br\/> $\\Rightarrow$ ($7942 + 3564$) $\\not \\vdots$ 9 <br\/> +) S\u1ed1 8210 c\u00f3 t\u1ed5ng c\u00e1c ch\u1eef s\u1ed1 l\u00e0: 8 + 2 + 1 + 0 = 11 <br\/> V\u00ec 11 $\\not \\vdots$ 9 $\\Rightarrow$ 8210 $\\not \\vdots$ 9 <br\/> S\u1ed1 9405 c\u00f3 t\u1ed5ng c\u00e1c ch\u1eef s\u1ed1 l\u00e0: 9 + 4 + 0 + 5 = 18 <br\/> V\u00ec 18 $\\vdots$ 9 $\\Rightarrow$ 9405 $\\vdots$ 9 <br\/> $\\Rightarrow$ (8210 + 9405) $\\not \\vdots$ 9 <br\/> +) S\u1ed1 1908 c\u00f3 t\u1ed5ng c\u00e1c ch\u1eef s\u1ed1 l\u00e0: 1 + 9 + 0 + 8 = 18 <br\/> V\u00ec 18 $\\vdots$ 9 $\\Rightarrow$ 1908 $\\vdots$ 9 <br\/> S\u1ed1 3069 c\u00f3 t\u1ed5ng c\u00e1c ch\u1eef s\u1ed1 l\u00e0: 3 + 0 + 6 + 9 = 18 <br\/> V\u00ec 18 $\\vdots$ 9 $\\Rightarrow$ 3069 $\\vdots$ 9 <br\/> $\\Rightarrow$ $(1908 + 3069)$ $\\vdots$ 9 <br\/> <span class='basic_pink'> V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: D <\/span> ","column":2}]}],"id_ques":542},{"time":24,"part":[{"title":"\u0110i\u1ec1n s\u1ed1 th\u00edch h\u1ee3p v\u00e0o ch\u1ed7 tr\u1ed1ng","title_trans":"","temp":"fill_the_blank","correct":[[["30"]]],"list":[{"point":5,"width":60,"content":"","type_input":"","ques":"<center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/daiso/bai11/lv2/img\/11.jpg' \/><\/center> <br\/> C\u00f3 bao nhi\u00eau s\u1ed1 c\u00f3 2 ch\u1eef s\u1ed1 chia h\u1ebft cho 3 <br\/> \u0110\u00e1p \u00e1n l\u00e0: _input_ ","hint":"T\u00ednh s\u1ed1 s\u1ed1 h\u1ea1ng c\u1ee7a d\u00e3y c\u00e1ch \u0111\u1ec1u 3 \u0111\u01a1n v\u1ecb t\u1eeb s\u1ed1 nh\u1ecf nh\u1ea5t c\u00f3 hai ch\u1eef s\u1ed1 chia h\u1ebft cho 3 \u0111\u1ebfn s\u1ed1 l\u1edbn nh\u1ea5t c\u00f3 hai ch\u1eef s\u1ed1 chia h\u1ebft cho 3 ","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> <b> B\u01b0\u1edbc 1: <\/b> X\u00e1c \u0111\u1ecbnh s\u1ed1 nh\u1ecf nh\u1ea5t v\u00e0 s\u1ed1 l\u1edbn nh\u1ea5t c\u00f3 hai ch\u1eef s\u1ed1 chia h\u1ebft cho 3 <br\/> <b> B\u01b0\u1edbc 2: <\/b> Vi\u1ebft d\u00e3y c\u00e1c s\u1ed1 c\u00f3 hai ch\u1eef s\u1ed1 chia h\u1ebft cho 3 <br\/> <b> B\u01b0\u1edbc 3: <\/b> T\u00ednh s\u1ed1 s\u1ed1 h\u1ea1ng c\u1ee7a d\u00e3y tr\u00ean <\/span> <br\/><br\/> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> V\u00ec s\u1ed1 c\u00f3 t\u1ed5ng c\u00e1c ch\u1eef s\u1ed1 chia h\u1ebft cho 3 th\u00ec chia h\u1ebft cho 3 n\u00ean: <br\/> S\u1ed1 nh\u1ecf nh\u1ea5t c\u00f3 hai ch\u1eef s\u1ed1 chia h\u1ebft cho 3 l\u00e0: 12 <br\/> S\u1ed1 l\u1edbn nh\u1ea5t c\u00f3 hai ch\u1eef s\u1ed1 chia h\u1ebft cho 3 l\u00e0: 99 <br\/> D\u00e3y c\u00e1c s\u1ed1 c\u00f3 hai ch\u1eef s\u1ed1 chia h\u1ebft cho 3 l\u00e0: 12; 15; 18; ...; 99 <br\/> S\u1ed1 s\u1ed1 h\u1ea1ng c\u1ee7a d\u00e3y tr\u00ean l\u00e0: (99 - 12) : 3 + 1 = 30 s\u1ed1 <br\/> V\u1eady c\u00f3 30 s\u1ed1 c\u00f3 hai ch\u1eef s\u1ed1 chia h\u1ebft cho 3 <br\/> <span class='basic_pink'> V\u1eady s\u1ed1 c\u1ea7n \u0111i\u1ec1n l\u00e0: 30 <\/span>"}]}],"id_ques":543},{"time":24,"part":[{"title":"\u0110i\u1ec1n s\u1ed1 th\u00edch h\u1ee3p v\u00e0o ch\u1ed7 tr\u1ed1ng","title_trans":"","temp":"fill_the_blank","correct":[[["100"]]],"list":[{"point":5,"width":60,"content":"","type_input":"","ques":"<center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/daiso/bai11/lv2/img\/11.jpg' \/><\/center> <br\/> C\u00f3 bao nhi\u00eau s\u1ed1 c\u00f3 3 ch\u1eef s\u1ed1 chia h\u1ebft cho 9 <br\/> \u0110\u00e1p \u00e1n l\u00e0: _input_ ","hint":"T\u00ednh s\u1ed1 s\u1ed1 h\u1ea1ng c\u1ee7a d\u00e3y c\u00e1ch \u0111\u1ec1u 9 \u0111\u01a1n v\u1ecb t\u1eeb s\u1ed1 nh\u1ecf nh\u1ea5t c\u00f3 ba ch\u1eef s\u1ed1 chia h\u1ebft cho 9 \u0111\u1ebfn s\u1ed1 l\u1edbn nh\u1ea5t c\u00f3 ba ch\u1eef s\u1ed1 chia h\u1ebft cho 9 ","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> <b> B\u01b0\u1edbc 1: <\/b> X\u00e1c \u0111\u1ecbnh s\u1ed1 nh\u1ecf nh\u1ea5t v\u00e0 s\u1ed1 l\u1edbn nh\u1ea5t c\u00f3 ba ch\u1eef s\u1ed1 chia h\u1ebft cho 9 <br\/> <b> B\u01b0\u1edbc 2: <\/b> Vi\u1ebft d\u00e3y c\u00e1c s\u1ed1 c\u00f3 ba ch\u1eef s\u1ed1 chia h\u1ebft cho 9 <br\/> <b> B\u01b0\u1edbc 3: <\/b> T\u00ednh s\u1ed1 s\u1ed1 h\u1ea1ng c\u1ee7a d\u00e3y tr\u00ean <\/span> <br\/><br\/> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> V\u00ec s\u1ed1 c\u00f3 t\u1ed5ng c\u00e1c ch\u1eef s\u1ed1 chia h\u1ebft cho 9 th\u00ec chia h\u1ebft cho 9 n\u00ean: <br\/> S\u1ed1 nh\u1ecf nh\u1ea5t c\u00f3 ba ch\u1eef s\u1ed1 chia h\u1ebft cho 9 l\u00e0: 108 <br\/> S\u1ed1 l\u1edbn nh\u1ea5t c\u00f3 ba ch\u1eef s\u1ed1 chia h\u1ebft cho 9 l\u00e0: 999 <br\/> D\u00e3y c\u00e1c s\u1ed1 c\u00f3 ba ch\u1eef s\u1ed1 chia h\u1ebft cho 9 l\u00e0: 108; 117; 126; ...; 999 <br\/> S\u1ed1 s\u1ed1 h\u1ea1ng c\u1ee7a d\u00e3y tr\u00ean l\u00e0: (999 - 108) : 9 + 1 = 100 s\u1ed1 <br\/> V\u1eady c\u00f3 100 s\u1ed1 c\u00f3 ba ch\u1eef s\u1ed1 chia h\u1ebft cho 9 <br\/> <span class='basic_pink'> V\u1eady s\u1ed1 c\u1ea7n \u0111i\u1ec1n l\u00e0: 100 <\/span>"}]}],"id_ques":544},{"time":24,"part":[{"title":"\u0110i\u1ec1n s\u1ed1 th\u00edch h\u1ee3p v\u00e0o ch\u1ed7 tr\u1ed1ng","title_trans":"","temp":"fill_the_blank","correct":[[["5"]]],"list":[{"point":5,"width":60,"content":"","type_input":"","ques":"<center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/daiso/bai11/lv2/img\/3.jpg' \/><\/center> <br\/> Thay * b\u1eb1ng ch\u1eef s\u1ed1 th\u00edch h\u1ee3p \u0111\u1ec3 $\\overline{9143*5}$ chia h\u1ebft cho 9<br\/> \u0110\u00e1p \u00e1n l\u00e0:* = _input_ ","hint":"T\u00ednh s\u1ed1 s\u1ed1 h\u1ea1ng c\u1ee7a s\u1ed1 tr\u00ean sau \u0111\u00f3 t\u00ecm ch\u1eef s\u1ed1 th\u00edch h\u1ee3p thay v\u00e0o * \u0111\u1ec3 \u0111\u01b0\u1ee3c s\u1ed1 c\u00f3 t\u1ed5ng c\u00e1c ch\u1eef s\u1ed1 chia h\u1ebft cho 9","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> <b> B\u01b0\u1edbc 1: <\/b> T\u00ednh t\u1ed5ng c\u00e1c ch\u1eef s\u1ed1 c\u1ee7a s\u1ed1 $\\overline{9143*5}$ <br\/> <b> B\u01b0\u1edbc 2: <\/b> T\u00ecm ch\u1eef s\u1ed1 th\u00edch h\u1ee3p thay v\u00e0o s\u1ed1 $\\overline{9143*5}$ \u0111\u1ec3 \u0111\u01b0\u1ee3c s\u1ed1 c\u00f3 t\u1ed5ng c\u00e1c ch\u1eef s\u1ed1 chia h\u1ebft cho 9; * = 0; 1; 2; ...; 9 <\/span> <br\/><br\/> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> S\u1ed1 $\\overline{9143*5}$ c\u00f3 t\u1ed5ng c\u00e1c ch\u1eef s\u1ed1 l\u00e0: <br\/> 9 + 1 + 4 + 3 + * + 5 = 22 + * <br\/> Th\u1eed l\u1ea7n l\u01b0\u1ee3t c\u00e1c gi\u00e1 tr\u1ecb * = 1; 2; 3; ...; 9 <br\/> Ta th\u1ea5y: V\u1edbi * = 5 th\u00ec s\u1ed1 914355 c\u00f3 t\u1ed5ng c\u00e1c ch\u1eef s\u1ed1 l\u00e0: 9 + 1 + 4 + 3 + 5 + 5 = 27 <br\/> V\u00ec 27 $\\vdots$ 9 $\\Rightarrow$ 914355 $\\vdots$ 9 <br\/> Ngo\u00e0i ra kh\u00f4ng c\u00f2n gi\u00e1 tr\u1ecb n\u00e0o c\u1ee7a * th\u00edch h\u1ee3p <br\/> <span class='basic_pink'> V\u1eady s\u1ed1 c\u1ea7n \u0111i\u1ec1n l\u00e0: 5 <\/span>"}]}],"id_ques":545},{"time":24,"part":[{"title":"\u0110i\u1ec1n s\u1ed1 th\u00edch h\u1ee3p v\u00e0o ch\u1ed7 tr\u1ed1ng","title_trans":"","temp":"fill_the_blank","correct":[[["2"]]],"list":[{"point":5,"width":60,"content":"","type_input":"","ques":"<center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/daiso/bai11/lv2/img\/3.jpg' \/><\/center> <br\/> Thay a b\u1eb1ng ch\u1eef s\u1ed1 th\u00edch h\u1ee3p \u0111\u1ec3 $\\overline{81a5a}$ chia h\u1ebft cho 9<br\/> \u0110\u00e1p \u00e1n l\u00e0:a = _input_ ","hint":"T\u00ednh t\u1ed5ng c\u00e1c ch\u1eef s\u1ed1 c\u1ee7a s\u1ed1 tr\u00ean sau \u0111\u00f3 t\u00ecm ch\u1eef s\u1ed1 th\u00edch h\u1ee3p thay v\u00e0o a \u0111\u1ec3 \u0111\u01b0\u1ee3c s\u1ed1 c\u00f3 t\u1ed5ng c\u00e1c ch\u1eef s\u1ed1 chia h\u1ebft cho 9","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> <b> B\u01b0\u1edbc 1: <\/b> T\u00ednh t\u1ed5ng c\u00e1c ch\u1eef s\u1ed1 c\u1ee7a s\u1ed1 $\\overline{81a5a}$ <br\/> <b> B\u01b0\u1edbc 2: <\/b> T\u00ecm ch\u1eef s\u1ed1 th\u00edch h\u1ee3p thay v\u00e0o s\u1ed1 $\\overline{81a5a}$ \u0111\u1ec3 \u0111\u01b0\u1ee3c s\u1ed1 c\u00f3 t\u1ed5ng c\u00e1c ch\u1eef s\u1ed1 chia h\u1ebft cho 9; a = 0; 1; 2; ...; 9 <\/span> <br\/><br\/> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> S\u1ed1 $\\overline{81a5a}$ c\u00f3 t\u1ed5ng c\u00e1c ch\u1eef s\u1ed1 l\u00e0: <br\/> 8 + 1 + a + 5 + a = 14 + 2.a <br\/> Th\u1eed l\u1ea7n l\u01b0\u1ee3t c\u00e1c gi\u00e1 tr\u1ecb a = 1; 2; 3; ...; 9 <br\/> Ta th\u1ea5y: V\u1edbi a = 2 th\u00ec s\u1ed1 81252 c\u00f3 t\u1ed5ng c\u00e1c ch\u1eef s\u1ed1 l\u00e0: 8 + 1 + 2 + 5 + 2 = 18 <br\/> V\u00ec 18 $\\vdots$ 9 $\\Rightarrow$ 81252 $\\vdots$ 9 <br\/> Ngo\u00e0i ra kh\u00f4ng c\u00f2n gi\u00e1 tr\u1ecb n\u00e0o c\u1ee7a a th\u00edch h\u1ee3p <br\/> <span class='basic_pink'> V\u1eady s\u1ed1 c\u1ea7n \u0111i\u1ec1n l\u00e0: 2 <\/span>"}]}],"id_ques":546},{"time":24,"part":[{"title":"\u0110i\u1ec1n s\u1ed1 th\u00edch h\u1ee3p v\u00e0o ch\u1ed7 tr\u1ed1ng","title_trans":"","temp":"fill_the_blank","correct":[[["90"]]],"list":[{"point":5,"width":60,"content":"","type_input":"","ques":"<center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/daiso/bai11/lv2/img\/4.jpg' \/><\/center> <br\/> S\u1ed1 l\u1edbn nh\u1ea5t c\u00f3 hai ch\u1eef s\u1ed1 chia h\u1ebft cho 2, 5, 3, 9 l\u00e0: _input_ ","hint":"","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> <b> B\u01b0\u1edbc 1: <\/b> G\u1ecdi s\u1ed1 c\u1ea7n t\u00ecm l\u00e0 $\\overline{ab}$, x\u00e1c \u0111\u1ecbnh ch\u1eef s\u1ed1 b \u0111\u1ec3 $\\overline{ab}$ chia h\u1ebft cho 2 v\u00e0 5 <br\/> <b> B\u01b0\u1edbc 2: <\/b> X\u00e1c \u0111\u1ecbnh ch\u1eef s\u1ed1 h\u00e0ng ch\u1ee5ca \u0111\u1ec3 $\\overline{ab}$ chia h\u1ebft cho 2; 5; 3; 9 <\/span> <br\/><br\/> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> G\u1ecdi s\u1ed1 c\u1ea7n t\u00ecm l\u00e0 $\\overline{ab}$ <br\/> \u0110\u1ec3 $\\overline{ab}$ chia h\u1ebft cho 2 v\u00e0 5 th\u00ec b = 0 <br\/> Th\u1eed l\u1ea7n l\u01b0\u1ee3t c\u00e1c gi\u00e1 tr\u1ecb a = 9; 8; 7; ...; 0 <br\/> Ta th\u1ea5y v\u1edbi a = 9 th\u00ec s\u1ed1 90 chia h\u1ebft cho 2, 5, 3, 9 <br\/> <span class='basic_pink'> V\u1eady s\u1ed1 c\u1ea7n \u0111i\u1ec1n l\u00e0: 90 <\/span>"}]}],"id_ques":547},{"time":24,"part":[{"title":"\u0110i\u1ec1n s\u1ed1 th\u00edch h\u1ee3p v\u00e0o ch\u1ed7 tr\u1ed1ng","title_trans":"","temp":"fill_the_blank","correct":[[["18"]]],"list":[{"point":5,"width":60,"content":"","type_input":"","ques":"<center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/daiso/bai11/lv2/img\/4.jpg' \/><\/center> <br\/> S\u1ed1 nh\u1ecf nh\u1ea5t c\u00f3 hai ch\u1eef s\u1ed1 chia h\u1ebft cho 2 v\u00e0 9 l\u00e0: _input_ ","hint":"","explain":" <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> S\u1ed1 nh\u1ecf nh\u1ea5t c\u00f3 hai ch\u1eef s\u1ed1 chia h\u1ebft cho 2 v\u00e0 9 l\u00e0 18 <br\/> <span class='basic_pink'> V\u1eady s\u1ed1 c\u1ea7n \u0111i\u1ec1n l\u00e0: 18 <\/span>"}]}],"id_ques":548},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[["2"]],"list":[{"point":5,"ques":" <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/daiso/bai11/lv2/img\/2.jpg' \/><\/center> <br\/> S\u1ed1 chia 9 d\u01b0 1 th\u00ec chia h\u1ebft cho 3 <b> \u0110\u00daNG <\/b> hay <b> SAI <\/b>?","select":["A. \u0110\u00daNG","B. SAI "],"hint":"Vi\u1ebft d\u1ea1ng t\u1ed5ng qu\u00e1t c\u1ee7a s\u1ed1 tr\u00ean sau \u0111\u00f3 d\u1ef1a v\u00e0o t\u00ednh ch\u1ea5t chia h\u1ebft c\u1ee7a m\u1ed9t t\u1ed5ng","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> V\u00ec s\u1ed1 \u0111\u00f3 chia 9 d\u01b0 1 n\u00ean s\u1ed1 \u0111\u00f3 c\u00f3 d\u1ea1ng 9a + 1 <br\/> D\u1ef1a v\u00e0o t\u00ednh ch\u1ea5t chia h\u1ebft c\u1ee7a m\u1ed9t t\u1ed5ng x\u00e9t xem t\u1ed5ng tr\u00ean c\u00f3 chia h\u1ebft cho 3 kh\u00f4ng <\/span> <br\/><br\/> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span> <br\/> V\u00ec s\u1ed1 \u0111\u00f3 chia 9 d\u01b0 1 n\u00ean s\u1ed1 \u0111\u00f3 c\u00f3 d\u1ea1ng: 9a + 1 ($a \\in \\mathbb{N}$) <br\/> Ta c\u00f3 9a $\\vdots$ 3 v\u00e0 1 $\\not \\vdots$ 3 <br\/> $\\Rightarrow$ (9a + 1) $\\not \\vdots$ 3 <br\/> V\u1eady kh\u1eb3ng \u0111\u1ecbnh ''s\u1ed1 chia 9 d\u01b0 1 th\u00ec chia h\u1ebft cho 3'' l\u00e0 <b> SAI <\/b> <br\/> <span class='basic_pink'> V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: B <\/span> ","column":2}]}],"id_ques":549},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[["1"]],"list":[{"point":5,"ques":" <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/daiso/bai11/lv2/img\/2.jpg' \/><\/center> <br\/> S\u1ed1 chia h\u1ebft cho 2; 5; 3; 9 th\u00ec c\u00f3 ch\u1eef s\u1ed1 t\u1eadn c\u00f9ng l\u00e0 0 <b> \u0110\u00daNG <\/b> hay <b> SAI <\/b>?","select":["A. \u0110\u00daNG","B. SAI "],"hint":"","explain":" <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span> <br\/> V\u00ec s\u1ed1 chia h\u1ebft cho 2 v\u00e0 5 th\u00ec c\u00f3 ch\u1eef s\u1ed1 t\u1eadn c\u00f9ng l\u00e0 0 <br\/> N\u00ean s\u1ed1 chia h\u1ebft cho 2; 5; 3; 9 c\u00f3 ch\u1eef s\u1ed1 t\u1eadn c\u00f9ng l\u00e0 0 <br\/> V\u1eady kh\u1eb3ng \u0111\u1ecbnh ''S\u1ed1 chia h\u1ebft cho 2; 5; 3; 9 th\u00ec c\u00f3 ch\u1eef s\u1ed1 t\u1eadn c\u00f9ng l\u00e0 0'' l\u00e0 <b> \u0110\u00daNG <\/b> <br\/> <span class='basic_pink'> V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: A <\/span> ","column":2}]}],"id_ques":550}],"lesson":{"save":0,"level":2}}