{"segment":[{"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/bai15/lv2/img\/13.jpg' \/><\/center> <br\/> \u01afCLN(150; 120; 210) = ?","select":["A. 56","B. 30","C. 21","D. 50"],"hint":"","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> <b> B\u01b0\u1edbc 1: <\/b> Ph\u00e2n t\u00edch 150; 120 v\u00e0 210 ra th\u1eeba s\u1ed1 nguy\u00ean t\u1ed1 <br\/> <b> B\u01b0\u1edbc 2: <\/b> Ch\u1ecdn ra c\u00e1c th\u1eeba s\u1ed1 chung <br\/> <b> B\u01b0\u1edbc 3: <\/b> L\u1eadp t\u00edch c\u00e1c th\u1eeba s\u1ed1 \u0111\u00e3 ch\u1ecdn, m\u1ed7i th\u1eeba s\u1ed1 l\u1ea5y v\u1edbi s\u1ed1 m\u0169 nh\u1ecf nh\u1ea5t c\u1ee7a n\u00f3. <\/span> <br\/><br\/> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span> <br\/>Ta c\u00f3: <br\/> $150 = 2 . 3 . 5^2$ <br\/> $120 = 2^3 . 3 . 5$ <br\/> $210 = 2 . 3 . 5 . 7$ <br\/> C\u00e1c th\u1eeba s\u1ed1 nguy\u00ean t\u1ed1 chung l\u00e0: 2; 3 v\u00e0 5, s\u1ed1 m\u0169 nh\u1ecf nh\u1ea5t l\u00e0 1 <br\/> $\\Rightarrow$ \u01afCLN(150; 120; 210) = $2 . 3 . 5$ = 30<br\/> <span class='basic_pink'> V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: B. 30 <\/span> ","column":4}]}],"id_ques":731},{"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/bai15/lv2/img\/13.jpg' \/><\/center> <br\/> \u01afCLN(16; 32; 128) = ?","select":["A. 16","B. 8","C. 12","D. 4"],"hint":"","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> <b> B\u01b0\u1edbc 1: <\/b> Ph\u00e2n t\u00edch 16; 32 v\u00e0 128 ra th\u1eeba s\u1ed1 nguy\u00ean t\u1ed1 <br\/> <b> B\u01b0\u1edbc 2: <\/b> Ch\u1ecdn ra c\u00e1c th\u1eeba s\u1ed1 chung <br\/> <b> B\u01b0\u1edbc 3: <\/b> L\u1eadp t\u00edch c\u00e1c th\u1eeba s\u1ed1 \u0111\u00e3 ch\u1ecdn, m\u1ed7i th\u1eeba s\u1ed1 l\u1ea5y v\u1edbi s\u1ed1 m\u0169 nh\u1ecf nh\u1ea5t c\u1ee7a n\u00f3. <\/span> <br\/><br\/> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span> <br\/>Ta c\u00f3: <br\/> $16 = 2^4$ <br\/> $32 = 2^5$ <br\/> $128 = 2^7$ <br\/> Th\u1eeba s\u1ed1 nguy\u00ean t\u1ed1 chung l\u00e0: 2, s\u1ed1 m\u0169 nh\u1ecf nh\u1ea5t l\u00e0 4 <br\/> $\\Rightarrow$ \u01afCLN(16; 32; 128) = $2^4 = 16$<br\/> <span class='basic_pink'> V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: A. 16 <\/span> ","column":4}]}],"id_ques":732},{"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/bai15/lv2/img\/11.jpg' \/><\/center> <br\/> T\u00ecm x l\u1edbn nh\u1ea5t bi\u1ebft x + 150 v\u00e0 x + 375 \u0111\u1ec1u l\u00e0 b\u1ed9i c\u1ee7a x?","select":["A. x = 25","B. x = 75","C. x = 50","D. x = 30"],"hint":"Ta \u0111i t\u00ecm x sao cho (x + 150) $\\vdots$ x v\u00e0 (x + 375) $\\vdots$ x","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> V\u00ec x + 150 v\u00e0 x + 375 l\u00e0 b\u1ed9i c\u1ee7a x n\u00ean x $\\in$ \u01afC(x + 150; x + 375) <br\/> V\u00ec x $\\vdots$ x v\u00e0 x l\u1edbn nh\u1ea5t $\\Rightarrow$ x = \u01afCLN(150; 375) <br\/> B\u00e0i to\u00e1n quy v\u1ec1 b\u00e0i to\u00e1n t\u00ecm \u01b0\u1edbc chung l\u1edbn nh\u1ea5t <\/span> <br\/><br\/> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span> <br\/>Ta c\u00f3: <br\/> V\u00ec x + 150 v\u00e0 x + 375 \u0111\u1ec1u l\u00e0 b\u1ed9i c\u1ee7a x n\u00ean (x + 150) $\\vdots$ x v\u00e0 (x + 375) $\\vdots$ x <br\/> V\u00ec x $\\vdots$ x $\\Rightarrow$ 150 $\\vdots$ x v\u00e0 375 $\\vdots$ x <br\/> $\\Rightarrow$ x $\\in$ \u01afC(150; 175) <br\/> V\u00ec x l\u1edbn nh\u1ea5t $\\Rightarrow$ x = \u01afCLN(150; 375) <br\/> $150 = 2 . 3 . 5^2$ ; $375 = 3 . 5^3$ <br\/> $\\Rightarrow$ x = \u01afCLN(150; 375) = $3 . 5^2 = 75$ <br\/> <span class='basic_pink'> V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: B. x = 75 <\/span> ","column":4}]}],"id_ques":733},{"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/bai15/lv2/img\/11.jpg' \/><\/center> <br\/> T\u00ecm x l\u1edbn nh\u1ea5t bi\u1ebft x + 220 v\u00e0 x + 160 \u0111\u1ec1u l\u00e0 b\u1ed9i c\u1ee7a x?","select":["A. x = 20","B. x = 25","C. x = 32","D. x = 22"],"hint":"Ta \u0111i t\u00ecm x sao cho (x + 220) $\\vdots$ x v\u00e0 (x + 160) $\\vdots$ x","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> V\u00ec x + 220 v\u00e0 x + 160 l\u00e0 b\u1ed9i c\u1ee7a x n\u00ean x $\\in$ \u01afC(x + 220; x + 160) <br\/> V\u00ec x $\\vdots$ x v\u00e0 x l\u1edbn nh\u1ea5t $\\Rightarrow$ x = \u01afCLN(220; 160) <br\/> B\u00e0i to\u00e1n quy v\u1ec1 b\u00e0i to\u00e1n t\u00ecm \u01b0\u1edbc chung l\u1edbn nh\u1ea5t <\/span> <br\/><br\/> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span> <br\/>Ta c\u00f3: <br\/> V\u00ec x + 220 v\u00e0 x + 160 \u0111\u1ec1u l\u00e0 b\u1ed9i c\u1ee7a x n\u00ean (x + 220) $\\vdots$ x v\u00e0 (x + 160) $\\vdots$ x <br\/> V\u00ec x $\\vdots$ x $\\Rightarrow$ 220 $\\vdots$ x v\u00e0 160 $\\vdots$ x <br\/> $\\Rightarrow$ x $\\in$ \u01afC(220; 160) <br\/> V\u00ec x l\u1edbn nh\u1ea5t $\\Rightarrow$ x $\\in$ \u01afCLN(220; 160) <br\/> $220 = 2^2 . 5 . 11$ ; $160 = 2^5 . 5$ <br\/> $\\Rightarrow$ x = \u01afCLN(220; 160) = $2^2 . 5 = 20$ <br\/> <span class='basic_pink'> V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: A. x = 20 <\/span> ","column":4}]}],"id_ques":734},{"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":[[["40"]]],"list":[{"point":5,"width":60,"content":"","type_input":"","ques":"M\u1ed9t c\u0103n ph\u00f2ng h\u00ecnh ch\u1eef nh\u1eadt d\u00e0i 680cm, r\u1ed9ng 480cm. Ng\u01b0\u1eddi ta mu\u1ed1n l\u00e1t k\u00edn c\u0103n ph\u00f2ng \u0111\u00f3 b\u1eb1ng g\u1ea1ch h\u00ecnh vu\u00f4ng m\u00e0 kh\u00f4ng c\u00f3 vi\u00ean g\u1ea1ch n\u00e0o b\u1ecb c\u1eaft x\u00e9n. H\u1ecfi vi\u00ean g\u1ea1ch c\u00f3 \u0111\u1ed9 d\u00e0i l\u1edbn nh\u1ea5t l\u00e0 bao nhi\u00eau? <br\/> \u0110\u00e1p s\u1ed1: _input_ cm","hint":"Mu\u1ed1n kh\u00f4ng c\u00f3 vi\u00ean g\u1ea1ch n\u00e0o b\u1ecb c\u1eaft x\u00e9n th\u00ec \u0111\u1ed9 d\u00e0i m\u1ed7i c\u1ea1nh vi\u00ean g\u1ea1ch b\u1eb1ng \u01afCLN(680; 480)","explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> V\u00ec mu\u1ed1n l\u00e1t g\u1ea1ch k\u00edn c\u0103n ph\u00f2ng m\u00e0 kh\u00f4ng c\u00f3 vi\u00ean g\u1ea1ch n\u00e0o b\u1ecb c\u1eaft x\u00e9n th\u00ec \u0111\u1ed9 d\u00e0i c\u1ea1nh vi\u00ean g\u1ea1ch ph\u1ea3i l\u00e0 \u01b0\u1edbc c\u1ee7a 680 v\u00e0 480 <br\/> \u0110\u1ec3 vi\u00ean g\u1ea1ch c\u00f3 \u0111\u1ed9 d\u00e0i l\u1edbn nh\u1ea5t th\u00ec \u0111\u1ed3 d\u00e0i c\u1ea1nh vi\u00ean g\u1ea1ch b\u1eb1ng \u01afCLN(680; 480) <\/span> <br\/><br\/> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> Ta c\u00f3: <br\/> G\u1ecdi chi\u1ec1u d\u00e0i vi\u00ean g\u1ea1ch l\u00e0 x <br\/> \u0110\u1ec3 l\u00e1t k\u00edn c\u0103n ph\u00f2ng m\u00e0 kh\u00f4ng c\u00f3 c\u00f3 vi\u00ean g\u1ea1ch n\u00e0o b\u1ecb c\u1eaft x\u00e9n th\u00ec x ph\u1ea3i l\u00e0 \u01b0\u1edbc c\u1ee7a chi\u1ec1u d\u00e0i v\u00e0 chi\u1ec1u r\u1ed9ng c\u0103n ph\u00f2ng <br\/> Hay 680 $\\vdots$ x v\u00e0 480 $\\vdots$ x <br\/> $\\Rightarrow$ x $\\in$ \u01afC(680; 480) <br\/> \u0110\u1ec3 x l\u00e0 l\u1edbn nh\u1ea5t $\\Rightarrow$ x = \u01afCLN(680; 480) <br\/> Ta c\u00f3: $680 = 2^3 . 5 . 17$ ; $480 = 2^5 . 3 . 5$ <br\/> $\\Rightarrow$ x = \u01afCLN(680; 480) = $2^3 . 5 = 40$ <br\/> V\u1eady \u0111\u1ec3 l\u00e1t k\u00edn c\u0103n ph\u00f2ng m\u00e0 kh\u00f4ng c\u00f3 vi\u00ean g\u1ea1ch n\u00e0o b\u1ecb c\u1eaft x\u00e9n th\u00ec \u0111\u1ed9 d\u00e0i c\u1ea1nh vi\u00ean g\u1ea1ch l\u1edbn nh\u1ea5t l\u00e0 40cm<br\/> <span class='basic_pink'> V\u1eady s\u1ed1 c\u1ea7n \u0111i\u1ec1n l\u00e0: 40 <\/span> "}]}],"id_ques":735},{"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":[[["12"]]],"list":[{"point":5,"width":60,"content":"","type_input":"","ques":"M\u1ed9t khu \u0111\u1ea5t h\u00ecnh ch\u1eef nh\u1eadt c\u00f3 chi\u1ec1u d\u00e0i 60m, r\u1ed9ng 24m. Ng\u01b0\u1eddi ta chia th\u00e0nh nh\u1eefng th\u1eeda \u0111\u1ea5t h\u00ecnh vu\u00f4ng b\u1eb1ng nhau, \u0111\u1ec3 m\u1ed7i th\u1eeda \u0111\u1ea5t \u0111\u00f3 c\u00f3 di\u1ec7n t\u00edch l\u1edbn nh\u1ea5t th\u00ec \u0111\u1ed9 d\u00e0i c\u1ea1nh m\u1ed7i th\u1eeda \u0111\u1ea5t \u0111\u00f3 l\u00e0 bao nhi\u00eau? <br\/> \u0110\u00e1p s\u1ed1: _input_ m","hint":"C\u1ea1nh m\u1ed7i th\u1eeda \u0111\u1ea5t b\u1eb1ng \u01b0\u1edbc chung l\u1edbn nh\u1ea5t c\u1ee7a c\u00e1c c\u1ea1nh khu \u0111\u1ea5t","explain":" <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> Ta c\u00f3: <br\/> G\u1ecdi c\u1ea1nh m\u1ed7i th\u1eeda \u0111\u1ea5t h\u00ecnh vu\u00f4ng chia \u0111\u01b0\u1ee3c l\u00e0 x (m) <br\/> \u0110\u1ec3 di\u1ec7n t\u00edch c\u00e1c th\u1eeda \u0111\u1ea5t \u0111\u00f3 l\u00e0 l\u1edbn nh\u1ea5t th\u00ec x ph\u1ea3i l\u1edbn nh\u1ea5t <br\/> V\u00ec c\u00e1c th\u1eeda \u0111\u1ea5t \u0111\u00f3 \u0111\u01b0\u1ee3c chia ra t\u1eeb \u0111\u00e1m \u0111\u1ea5t h\u00ecnh ch\u1eef nh\u1eadt ban \u0111\u1ea7u c\u00f3 chi\u1ec1u d\u00e0i 60m v\u00e0 24m <br\/> N\u00ean x ph\u1ea3i l\u00e0 \u01b0\u1edbc c\u1ee7a 60 v\u00e0 24 <br\/> Hay x $\\in$ \u01afC(60; 24) <br\/> V\u00ec x l\u00e0 l\u1edbn nh\u1ea5t n\u00ean x = \u01afCLN(60; 24) <br\/> Ta c\u00f3: $60 = 2^2 . 3 . 5$ ; $24 = 2^3 . 3$ <br\/> $\\Rightarrow$ x = \u01afCLN(60; 24) = $2^2 . 3 = 12$ <br\/> V\u1eady m\u1ed7i th\u1eeda \u0111\u1ea5t h\u00ecnh vu\u00f4ng \u0111\u00f3 c\u00f3 \u0111\u1ed9 d\u00e0i c\u1ea1nh l\u1edbn nh\u1ea5t l\u00e0 12m <br\/> <span class='basic_pink'> S\u1ed1 c\u1ea7n \u0111i\u1ec1n l\u00e0: 12<\/span> "}]}],"id_ques":736},{"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/bai15/lv2/img\/3.jpg' \/><\/center> <br\/> T\u00ecm s\u1ed1 t\u1ef1 nhi\u00ean a l\u1edbn nh\u1ea5t bi\u1ebft 120 $\\vdots$ a; 42 $\\vdots$ a v\u00e0 72 $\\vdots$ a","select":["A. a = 8","B. a = 6","C. a = 14","D. a = 18"],"hint":"a = \u01afCLN(120; 42; 72)","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> V\u00ec a l\u1edbn nh\u1ea5t; 120 $\\vdots$ a; 42 $\\vdots$ a v\u00e0 72 $\\vdots$ a <br\/> $\\Rightarrow$ a = \u01afCLN(120; 42; 72) <br\/> <b> B\u01b0\u1edbc 1: <\/b> Ph\u00e2n t\u00edch 120; 42 v\u00e0 72 ra th\u1eeba s\u1ed1 nguy\u00ean t\u1ed1 <br\/> <b> B\u01b0\u1edbc 2: <\/b> Ch\u1ecdn ra c\u00e1c th\u1eeba s\u1ed1 nguy\u00ean t\u1ed1 chung <br\/> <b> B\u01b0\u1edbc 3: <\/b> L\u1eadp t\u00edch c\u00e1c th\u1eeba s\u1ed1 nguy\u00ean t\u1ed1 chung \u0111\u00f3 m\u1ed7i th\u1eeba s\u1ed1 l\u1ea5y v\u1edbi s\u1ed1 m\u0169 nh\u1ecf nh\u1ea5t <\/span> <br\/><br\/> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span> <br\/> V\u00ec s\u1ed1 a c\u1ea7n t\u00ecm l\u00e0 l\u1edbn nh\u1ea5t v\u00e0 120 $\\vdots$ a; 42 $\\vdots$ a v\u00e0 72 $\\vdots$ a <br\/> $\\Rightarrow$ a = \u01afCLN(120; 42; 72) <br\/> Ta c\u00f3: $120 = 2^3 . 3 . 5$ ; $42 = 2 . 3 . 7$ ; $72 = 2^3 . 3^2$ <br\/> $\\Rightarrow$ a = \u01afCLN(120; 42; 72) = 2 . 3 = 6 <br\/> V\u1eady s\u1ed1 t\u1ef1 nhi\u00ean a l\u1edbn nh\u1ea5t \u0111\u1ec3 120 $\\vdots$ a; 42 $\\vdots$ a v\u00e0 72 $\\vdots$ a l\u00e0 6 <br\/> <span class='basic_pink'> \u0110\u00e1p \u00e1n \u0111\u00fang l\u00e0: B. a = 6<\/span> ","column":4}]}],"id_ques":737},{"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/bai15/lv2/img\/3.jpg' \/><\/center> <br\/> T\u00ecm s\u1ed1 t\u1ef1 nhi\u00ean a l\u1edbn nh\u1ea5t bi\u1ebft 81 $\\vdots$ a; 45 $\\vdots$ a v\u00e0 63 $\\vdots$ a","select":["A. a = 9","B. a = 27","C. a = 15","D. a = 21"],"hint":"a = \u01afCLN(81; 45; 63)","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> V\u00ec a l\u1edbn nh\u1ea5t; 81 $\\vdots$ a; 45 $\\vdots$ a v\u00e0 63 $\\vdots$ a <br\/> $\\Rightarrow$ a = \u01afCLN(81; 45; 63) <br\/> <b> B\u01b0\u1edbc 1: <\/b> Ph\u00e2n t\u00edch 81; 45 v\u00e0 63 ra th\u1eeba s\u1ed1 nguy\u00ean t\u1ed1 <br\/> <b> B\u01b0\u1edbc 2: <\/b> Ch\u1ecdn ra c\u00e1c th\u1eeba s\u1ed1 nguy\u00ean t\u1ed1 chung <br\/> <b> B\u01b0\u1edbc 3: <\/b> L\u1eadp t\u00edch c\u00e1c th\u1eeba s\u1ed1 nguy\u00ean t\u1ed1 chung \u0111\u00f3 m\u1ed7i th\u1eeba s\u1ed1 l\u1ea5y v\u1edbi s\u1ed1 m\u0169 nh\u1ecf nh\u1ea5t <\/span> <br\/><br\/> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span> <br\/> V\u00ec s\u1ed1 a c\u1ea7n t\u00ecm l\u00e0 l\u1edbn nh\u1ea5t v\u00e0 81 $\\vdots$ a; 45 $\\vdots$ a v\u00e0 63 $\\vdots$ a <br\/> $\\Rightarrow$ a = \u01afCLN(81; 45; 63) <br\/> Ta c\u00f3: $81 = 3^4$ ; $45 = 3^2 . 5$ ; $63 = 3^2 . 7$ <br\/> $\\Rightarrow$ a = \u01afCLN(81; 45; 63) = $3^2 = 9$ <br\/> V\u1eady s\u1ed1 t\u1ef1 nhi\u00ean a l\u1edbn nh\u1ea5t \u0111\u1ec3 81 $\\vdots$ a; 45 $\\vdots$ a v\u00e0 63 $\\vdots$ a l\u00e0 9 <br\/> <span class='basic_pink'> \u0110\u00e1p \u00e1n \u0111\u00fang l\u00e0: A. a = 9<\/span> ","column":4}]}],"id_ques":738},{"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/bai15/lv2/img\/7.jpg' \/><\/center> <br\/> Cho A - T\u1eadp h\u1ee3p c\u00e1c \u01b0\u1edbc c\u1ee7a 20 <br\/> B - t\u1eadp h\u1ee3p c\u00e1c \u01b0\u1edbc c\u1ee7a 15 ","select":["A. $A \\cap B = \\left\\{1; 5 \\right\\}$","B. $A \\cap B = \\left\\{2; 3 \\right\\}$","C. $A \\cap B = \\left\\{1; 3; 5 \\right\\}$","D. $A \\cap B = \\left\\{2; 4; 5 \\right\\}$"],"hint":"T\u00ecm t\u1eadp h\u1ee3p c\u00e1c \u01b0\u1edbc c\u1ee7a 20 v\u00e0 t\u00ecm t\u1eadp h\u1ee3p c\u00e1c \u01b0\u1edbc c\u1ee7a 15 r\u1ed3i t\u00ecm giao c\u1ee7a hai t\u1eadp h\u1ee3p","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> <b> B\u01b0\u1edbc 1: <\/b> T\u00ecm t\u1eadp h\u1ee3p A = \u01af(20); B = \u01af(15) <br\/> <b> B\u01b0\u1edbc 2: <\/b> T\u00ecm c\u00e1c ph\u1ea7n t\u1eed gi\u1ed1ng nhau c\u1ee7a hai t\u1eadp h\u1ee3p A v\u00e0 B <\/span> <br\/><br\/> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span> <br\/> Ta c\u00f3: <br\/> A = \u01af(20) = {1; 2; 4; 5; 10; 20} <br\/> B = \u01af(15) = {1; 3; 5; 15} <br\/> $A \\cap B = \\left\\{1; 5 \\right\\}$ <br\/> <span class='basic_pink'> \u0110\u00e1p \u00e1n \u0111\u00fang l\u00e0: A <\/span> ","column":2}]}],"id_ques":739},{"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/bai15/lv2/img\/7.jpg' \/><\/center> <br\/> Cho A - T\u1eadp h\u1ee3p c\u00e1c \u01b0\u1edbc c\u1ee7a 42 <br\/> B - t\u1eadp h\u1ee3p c\u00e1c \u01b0\u1edbc c\u1ee7a 35 ","select":["A. $A \\cap B = \\left\\{1; 3; 6 \\right\\}$","B. $A \\cap B = \\left\\{1; 3; 7 \\right\\}$","C. $A \\cap B = \\left\\{1; 7 \\right\\}$","D. $A \\cap B = \\left\\{5; 7 \\right\\}$"],"hint":"T\u00ecm t\u1eadp h\u1ee3p c\u00e1c \u01b0\u1edbc c\u1ee7a 42 v\u00e0 t\u00ecm t\u1eadp h\u1ee3p c\u00e1c \u01b0\u1edbc c\u1ee7a 35 r\u1ed3i t\u00ecm giao c\u1ee7a hai t\u1eadp h\u1ee3p","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> <b> B\u01b0\u1edbc 1: <\/b> T\u00ecm t\u1eadp h\u1ee3p A = \u01af(42); B = \u01af(35) <br\/> <b> B\u01b0\u1edbc 2: <\/b> T\u00ecm c\u00e1c ph\u1ea7n t\u1eed gi\u1ed1ng nhau c\u1ee7a hai t\u1eadp h\u1ee3p A v\u00e0 B <\/span> <br\/><br\/> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span> <br\/> Ta c\u00f3: <br\/> A = \u01af(42) = {1; 2; 3; 6; 7; 14; 21; 42} <br\/> B = \u01af(35) = {1; 5; 7; 35} <br\/> $A \\cap B = \\left\\{1; 7 \\right\\}$ <br\/> <span class='basic_pink'> \u0110\u00e1p \u00e1n \u0111\u00fang l\u00e0: C <\/span> ","column":2}]}],"id_ques":740},{"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/bai15/lv2/img\/12.jpg' \/><\/center> <br\/> C\u00f3 36 vi\u00ean bi m\u00e0u \u0111\u1ecf, 48 vi\u00ean bi m\u00e0u xanh. Vi\u1ec7t mu\u1ed1n chia th\u00e0nh nhi\u1ec1u ph\u1ea7n c\u00f3 s\u1ed1 bi b\u1eb1ng nhau m\u00e0 trong m\u1ed7i ph\u1ea7n c\u00f3 hai lo\u1ea1i bi m\u00e0 s\u1ed1 bi m\u1ed7i m\u00e0u b\u1eb1ng nhau. H\u1ecfi s\u1ed1 ph\u1ea7n l\u1edbn nh\u1ea5t m\u00e0 Vi\u1ec7t c\u00f3 th\u1ec3 chia l\u00e0 bao nhi\u00eau ph\u1ea7n? ","select":["A. 12 ph\u1ea7n","B. 6 ph\u1ea7n","C. 8 ph\u1ea7n","D. 18 ph\u1ea7n"],"hint":"S\u1ed1 ph\u1ea7n = \u01afCLN(36; 48)","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/>N\u1ebfu s\u1ed1 ph\u1ea7n l\u00e0 x (ph\u1ea7n) <br\/> V\u00ec s\u1ed1 bi \u1edf m\u1ed7i ph\u1ea7n b\u1eb1ng nhau n\u00ean 36 $\\vdots$ x v\u00e0 48 $\\vdots$ x <br\/> S\u1ed1 ph\u1ea7n nhi\u1ec1u nh\u1ea5t m\u00e0 Vi\u1ec7t chia \u0111\u01b0\u1ee3c ch\u00ednh l\u00e0 \u01afCLN(36; 48) <\/span> <br\/><br\/> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span> <br\/> Ta c\u00f3: <br\/> G\u1ecdi s\u1ed1 ph\u1ea7n m\u00e0 Vi\u1ec7t chia \u0111\u01b0\u1ee3c l\u00e0 x (ph\u1ea7n) <br\/> V\u00ec s\u1ed1 bi \u1edf m\u1ed7i ph\u1ea7n l\u00e0 b\u1eb1ng nhau n\u00ean 36 $\\vdots$ x v\u00e0 48 $\\vdots$ x <br\/> $\\Rightarrow$ x $\\in$ \u01afC(36; 48) <br\/> V\u00ec x l\u00e0 l\u1edbn nh\u1ea5t n\u00ean x = \u01afCLN(36; 48) <br\/> Ta c\u00f3: $36 = 2^2 . 3^2$ ; $48 = 2^4 . 3$ <br\/> $\\Rightarrow$ x = \u01afCLN(36; 48) = $2^2 . 3 = 12$ <br\/> V\u1eady Vi\u1ec7t chia \u0111\u01b0\u1ee3c nhi\u1ec1u nh\u1ea5t l\u00e0 12 ph\u1ea7n m\u00e0 m\u1ed7i ph\u1ea7n c\u00f3 s\u1ed1 bi m\u1ed7i m\u00e0u b\u1eb1ng nhau <br\/> <span class='basic_pink'> \u0110\u00e1p \u00e1n \u0111\u00fang l\u00e0: A <\/span> ","column":2}]}],"id_ques":741},{"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":" Hoa c\u00f3 48 vi\u00ean bi \u0111\u1ecf, 30 vi\u00ean bi xanh v\u00e0 60 vi\u00ean bi v\u00e0ng. Hoa mu\u1ed1n chia \u0111\u1ec1u s\u1ed1 bi v\u00e0o c\u00e1c t\u00fai, sao cho m\u1ed7i t\u00fai c\u00f3 \u0111\u1ee7 3 lo\u1ea1i bi. H\u1ecfi Hoa c\u00f3 th\u1ec3 chia v\u00e0o nhi\u1ec1u nh\u1ea5t bao nhi\u00eau t\u00fai m\u00e0 m\u1ed7i t\u00fai c\u00f3 s\u1ed1 bi m\u1ed7i m\u00e0u b\u1eb1ng nhau. ","select":["A. 6 t\u00fai","B. 12 t\u00fai","C. 15 t\u00fai","D. 4 t\u00fai"],"hint":"S\u1ed1 t\u00fai = \u01afCLN(48; 30; 60)","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/>N\u1ebfu s\u1ed1 t\u00fai chia \u0111\u01b0\u1ee3c l\u00e0 x (t\u00fai) <br\/> V\u00ec s\u1ed1 bi m\u1ed7i m\u00e0u \u1edf m\u1ed7i t\u00fai b\u1eb1ng nhau n\u00ean 48 $\\vdots$ x ; 30 $\\vdots$ x v\u00e0 60 $\\vdots$ x <br\/> S\u1ed1 t\u00fai nhi\u1ec1u nh\u1ea5t m\u00e0 Hoa chia \u0111\u01b0\u1ee3c ch\u00ednh l\u00e0 \u01afCLN(48; 30; 60) <\/span> <br\/><br\/> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span> <br\/> Ta c\u00f3: <br\/> G\u1ecdi s\u1ed1 t\u00fai m\u00e0 Hoa chia \u0111\u01b0\u1ee3c l\u00e0 x (t\u00fai) <br\/> V\u00ec s\u1ed1 bi m\u1ed7i m\u00e0u \u1edf m\u1ed7i t\u00fai c\u0169ng b\u1eb1ng nhau n\u00ean 48 $\\vdots$ x ; 30 $\\vdots$ x v\u00e0 60 $\\vdots$ x <br\/> $\\Rightarrow$ x $\\in$ \u01afC(48; 30; 60) <br\/> V\u00ec x l\u00e0 l\u1edbn nh\u1ea5t n\u00ean x = \u01afCLN(48; 30; 60) <br\/> Ta c\u00f3: $48 = 2^4 . 3$ ; $30 = 2 . 3 . 5$ ; $60 = 2^2 . 3 . 5$<br\/> $\\Rightarrow$ x = \u01afCLN(48; 30; 60) = $2 . 3 = 6$ <br\/> V\u1eady Hoa chia \u0111\u01b0\u1ee3c nhi\u1ec1u nh\u1ea5t l\u00e0 6 t\u00fai m\u00e0 m\u1ed7i t\u00fai c\u00f3 s\u1ed1 bi m\u1ed7i m\u00e0u b\u1eb1ng nhau <br\/> <span class='basic_pink'> \u0110\u00e1p \u00e1n \u0111\u00fang l\u00e0: A <\/span> ","column":2}]}],"id_ques":742},{"time":24,"part":[{"title":"","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t <br\/> <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/daiso/bai15/lv2/img\/4.jpg' \/><\/center> ","select":["A. $24 = \u01afCLN(96; 108)$","B. $8 = \u01afCLN(96; 108)$ ","C. $12 = \u01afCLN(96; 108)$","D. $9 = \u01afCLN(96; 108)$"],"hint":"","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/><b> B\u01b0\u1edbc 1: <\/b> T\u00ecm \u01afCLN(96; 108) = ? <br\/> <b> B\u01b0\u1edbc 2: <\/b> Ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang<\/span> <br\/><br\/> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span> <br\/> Ta c\u00f3: <br\/> $96 = 2^5 . 3$ ; $108 = 2^2 . 3^3$ <br\/> $\\Rightarrow$ \u01afCLN(96; 108) = $2^2 . 3 = 12$ <br\/> <span class='basic_pink'> V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: C <\/span> ","column":2}]}],"id_ques":743},{"time":24,"part":[{"title":"","title_trans":"","temp":"multiple_choice","correct":[[2]],"list":[{"point":5,"ques":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t <br\/> <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/daiso/bai15/lv2/img\/4.jpg' \/><\/center> ","select":["A. $4 = \u01afCLN(350; 196)$","B. $14 = \u01afCLN(350; 196)$ ","C. $49 = \u01afCLN(350; 196)$","D. $25= \u01afCLN(350; 196)$"],"hint":"","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/><b> B\u01b0\u1edbc 1: <\/b> T\u00ecm \u01afCLN(350; 196) = ? <br\/> <b> B\u01b0\u1edbc 2: <\/b> Ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang <\/span> <br\/><br\/> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span> <br\/> Ta c\u00f3: <br\/> $350 = 2 . 5^2 . 7$ ; $196 = 2^2 . 7^2$ <br\/> $\\Rightarrow$ \u01afCLN(350; 196) = 2 . 7 = 14 <br\/> <span class='basic_pink'> V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: B <\/span> ","column":2}]}],"id_ques":744},{"time":24,"part":[{"title":"","title_trans":"","temp":"multiple_choice","correct":[[2]],"list":[{"point":5,"ques":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t <br\/> <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/daiso/bai15/lv2/img\/8.jpg' \/><\/center> ","select":["A. $\u01afCLN(36; 39) > \u01afCLN(34; 85)$","B. $\u01afCLN(36; 39) < \u01afCLN(34; 85)$ ","C. $\u01afCLN(36; 39) = \u01afCLN(34; 85)$"],"hint":"","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/><b> B\u01b0\u1edbc 1: <\/b> T\u00ecm \u01afCLN(36; 39) = ? v\u00e0 \u01afCLN(34; 85) = ? <br\/> <b> B\u01b0\u1edbc 2: <\/b> So s\u00e1nh v\u00e0 ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang <\/span> <br\/><br\/> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span> <br\/> Ta c\u00f3: <br\/> $36 = 2^2 . 3^2$ ; $39 = 3 . 13$ <br\/> $\\Rightarrow$ \u01afCLN(36; 39) = 3 <br\/> $34 = 2 . 17$ ; $85 = 5 . 17$ <br\/> $\\Rightarrow$ \u01afCLN(34; 85) = 17 <br\/> V\u00ec 3 < 17 $\\Rightarrow$ \u01afCLN(36; 39) < \u01afCLN(34; 85) <br\/> <span class='basic_pink'> V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: B <\/span> ","column":1}]}],"id_ques":745},{"time":24,"part":[{"title":"","title_trans":"","temp":"multiple_choice","correct":[[1]],"list":[{"point":5,"ques":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t <br\/> <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/daiso/bai15/lv2/img\/8.jpg' \/><\/center> ","select":["A. $\u01afCLN(21; 28) > \u01afCLN(150; 168)$","B. $\u01afCLN(21; 28) < \u01afCLN(150; 168)$ ","C. $\u01afCLN(21; 28) = \u01afCLN(150; 168)$"],"hint":"","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/><b> B\u01b0\u1edbc 1: <\/b> T\u00ecm \u01afCLN(21; 28) = ? v\u00e0 \u01afCLN(150; 168) = ? <br\/> <b> B\u01b0\u1edbc 2: <\/b> So s\u00e1nh v\u00e0 ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang <\/span> <br\/><br\/> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span> <br\/> Ta c\u00f3: <br\/> $21 = 3 . 7$ ; $28 = 2^2 . 7$ <br\/> $\\Rightarrow$ \u01afCLN(21; 28) = 7 <br\/> $150 = 2 . 3 . 5^2$ ; $168 = 2^3 . 3 . 7$ <br\/> $\\Rightarrow$ \u01afCLN(150; 168) = 2 . 3 = 6 <br\/> V\u00ec 7 > 6 $\\Rightarrow$ \u01afCLN(21; 28) > \u01afCLN(150; 168) <br\/> <span class='basic_pink'> V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: A <\/span> ","column":1}]}],"id_ques":746},{"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/bai15/lv2/img\/2.jpg' \/><\/center> <br\/> T\u00ecm s\u1ed1 t\u1ef1 nhi\u00ean a l\u1edbn nh\u1ea5t bi\u1ebft 296 chia a d\u01b0 16, 230 chia a d\u01b0 10. ","select":["A. a = 10","B. a = 20 ","C. a = 14","D. a = 55"],"hint":"S\u1ed1 a c\u1ea7n t\u00ecm th\u1ecfa m\u00e3n (296 - 16) $\\vdots$ a v\u00e0 (230 - 10) $\\vdots$ a v\u00e0 a l\u1edbn nh\u1ea5t","explain":" <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span> <br\/> V\u00ec 296 chia a d\u01b0 16 $\\Rightarrow$ 296 - 16 = 280 $\\vdots$ a (1) <br\/> 230 chia a d\u01b0 10 $\\Rightarrow$ 230 - 10 = 220 $\\vdots$ a (2) <br\/> T\u1eeb (1) v\u00e0 (2) $\\Rightarrow$ a $\\in$ \u01afC(280; 220) <br\/> V\u00e0 v\u00ec a l\u00e0 s\u1ed1 l\u1edbn nh\u1ea5t n\u00ean a = \u01afCLN(280; 220) <br\/> Ta c\u00f3: $280 = 2^3 . 5 . 7$ ; $220 = 2^2 . 5 . 11$ <br\/> $\\Rightarrow$ a = \u01afCLN(280; 220) = $2^2 . 5 = 20$ <br\/> V\u1eady s\u1ed1 t\u1ef1 nhi\u00ean a l\u1edbn nh\u1ea5t \u0111\u1ec3 296 chia a d\u01b0 16 v\u00e0 230 chia a d\u01b0 10 l\u00e0 20 <br\/> <span class='basic_pink'> \u0110\u00e1p \u00e1n \u0111\u00fang l\u00e0: B. a = 20 <\/span> ","column":4}]}],"id_ques":747},{"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/bai15/lv2/img\/2.jpg' \/><\/center> <br\/> T\u00ecm s\u1ed1 t\u1ef1 nhi\u00ean a l\u1edbn nh\u1ea5t bi\u1ebft 350 chia a d\u01b0 14, 320 chia a d\u01b0 26. ","select":["A. a = 16","B. a = 21 ","C. a = 42","D. a = 49"],"hint":"S\u1ed1 a c\u1ea7n t\u00ecm th\u1ecfa m\u00e3n (350 - 14) $\\vdots$ a v\u00e0 (320 - 26) $\\vdots$ a v\u00e0 a l\u1edbn nh\u1ea5t","explain":" <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span> <br\/> V\u00ec 350 chia a d\u01b0 14 $\\Rightarrow$ 350 - 14 = 336 $\\vdots$ a (1) <br\/> 320 chia a d\u01b0 26 $\\Rightarrow$ 320 - 26 = 294 $\\vdots$ a (2) <br\/> T\u1eeb (1) v\u00e0 (2) $\\Rightarrow$ a $\\in$ \u01afC(336; 294) <br\/> V\u00e0 v\u00ec a l\u00e0 s\u1ed1 l\u1edbn nh\u1ea5t n\u00ean a = \u01afCLN(336; 294) <br\/> Ta c\u00f3: $336 = 2^4 . 3 . 7 $ ; $294 = 2 . 3 . 7^2$ <br\/> $\\Rightarrow$ a = \u01afCLN(336; 294) = $2 . 3 . 7 = 42$ <br\/> V\u1eady s\u1ed1 t\u1ef1 nhi\u00ean a l\u1edbn nh\u1ea5t \u0111\u1ec3 350 chia a d\u01b0 14 v\u00e0 320 chia a d\u01b0 26 l\u00e0 42 <br\/> <span class='basic_pink'> \u0110\u00e1p \u00e1n \u0111\u00fang l\u00e0: C. a = 42 <\/span> ","column":4}]}],"id_ques":748},{"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/bai15/lv2/img\/9.jpg' \/><\/center> <br\/> Cho t\u1eadp h\u1ee3p E l\u00e0 t\u1eadp h\u1ee3p c\u00e1c \u01b0\u1edbc c\u1ee7a 12<br\/> F l\u00e0 t\u1eadp h\u1ee3p c\u00e1c b\u1ed9i c\u1ee7a 3 ","select":["A. $E \\cap F = \\left\\{ 0; 1; 3; 6; 12 \\right\\}$","B.$E \\cap F = \\left\\{ 1; 6; 12 \\right\\}$ ","C. $E \\cap F = \\left\\{ 0; 3; 6 \\right\\}$","D. $E \\cap F = \\left\\{ 3; 6; 12 \\right\\}$"],"hint":"","explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> <b> B\u01b0\u1edbc 1: <\/b> T\u00ecm t\u1eadp h\u1ee3p c\u00e1c \u01b0\u1edbc c\u1ee7a 12 v\u00e0 t\u1eadp h\u1ee3p c\u00e1c b\u1ed9i c\u1ee7a 3 <br\/> <b> B\u01b0\u1edbc 2: <\/b> T\u00ecm giao c\u1ee7a hai t\u1eadp h\u1ee3p b\u1eb1ng c\u00e1ch l\u1ea5y c\u00e1c ph\u1ea7n t\u1eed gi\u1ed1ng nhau c\u1ee7a hai t\u1eadp h\u1ee3p \u0111\u00f3 <\/span> <br\/><br\/> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span> <br\/> Ta c\u00f3: <br\/> E = \u01af(12) = {1; 2; 3; 4; 6; 12} <br\/> F = B(3) = {0; 3; 6; 9; 12;....} <br\/> $E \\cap F$ = {3; 6; 12} <br\/> <span class='basic_pink'> \u0110\u00e1p \u00e1n \u0111\u00fang l\u00e0: D <\/span> ","column":2}]}],"id_ques":749},{"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/bai15/lv2/img\/9.jpg' \/><\/center> <br\/> \u01afC(30; 36; 48) = ? ","select":["A. $\\left\\{1; 2; 3; 6 \\right\\}$","B.$\\left\\{ 1; 2; 4; 12 \\right\\}$ ","C. $\\left\\{ 1; 3; 15; 18 \\right\\}$","D. $\\left\\{1; 3; 6; 8 \\right\\}$"],"hint":"","explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> <b> B\u01b0\u1edbc 1: <\/b> T\u00ecm \u01afCLN(30; 36; 48) = ? <br\/> <b> B\u01b0\u1edbc 2: <\/b> T\u1eadp h\u1ee3p c\u00e1c \u01b0\u1edbc chung ch\u00ednh l\u00e0 c\u00e1c \u01b0\u1edbc c\u1ee7a \u01afCLN v\u1eeba t\u00ecm \u1edf b\u01b0\u1edbc 1 <\/span> <br\/><br\/> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span> <br\/> Ta c\u00f3: <br\/> $30 = 2 . 3 . 5$; $36 = 2^2 . 3^2$ ; $48 = 2^4 . 3$ <br\/> $\\Rightarrow$ \u01afCLN(30; 36; 48) = 2 . 3 = 6 <br\/> $\\Rightarrow$ \u01afC(30; 36; 48) = \u01af(6) = {1; 2; 3; 6} <br\/> <span class='basic_pink'> V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: A <\/span> ","column":2}]}],"id_ques":750}],"lesson":{"save":0,"level":2}}