{"common":{"save":0,"post_id":"817","level":1,"total":20,"point":5,"point_extra":0},"segment":[{"id":"1751","post_id":"817","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":5,"ques":"Cho 3 ch\u1eef s\u1ed1 a, b, c kh\u00e1c nhau v\u00e0 kh\u00e1c 0. T\u1eadp h\u1ee3p A g\u1ed3m c\u00e1c s\u1ed1 c\u00f3 3 ch\u1eef s\u1ed1 g\u1ed3m \u0111\u1ee7 3 ch\u1eef s\u1ed1 tr\u00ean l\u00e0: ","select":["A. $A = \\left\\{ \\overline{abc}; \\overline{acb}; \\overline{aab}; \\overline{ccb}; \\overline{aaa}; \\overline{bbb} \\right\\}$ ","B. $A = \\left\\{ \\overline{abc}; \\overline{acb}; \\overline{bac}; \\overline{bca}; \\overline{cba}; \\overline{cab} \\right\\} $","C. $A = \\left\\{ \\overline{aaa}; \\overline{bbb}; \\overline{ccc}; \\overline{abc}; \\overline{cba}; \\overline{bca} \\right\\} $","D. $A = \\left\\{ \\overline{bba}; \\overline{ccb}; \\overline{aab}; \\overline{abc}; \\overline{aac}; \\overline{cca} \\right\\}$ "],"hint":"","explain":"<span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span> <br\/> T\u1eadp h\u1ee3p A g\u1ed3m c\u00e1c s\u1ed1 c\u00f3 \u0111\u1ee7 3 ch\u1eef s\u1ed1 a, b, c l\u00e0: <br\/> $A = \\left\\{ \\overline{abc}; \\overline{acb}; \\overline{bac}; \\overline{bca}; \\overline{cba}; \\overline{cab} \\right\\}$ <br\/> <span class='basic_pink'> V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: B <\/span> ","column":2}]}]},"correct":"","level":"1","hint":"","answer":"","type":"json","extra_type":"","time":"0","user_id":"0","test":"0","date":"2019-09-30 09:14:54"},{"id":"1752","post_id":"817","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":[[4]],"list":[{"point":5,"ques":"\u01afCLN(24; 54) = ? ","select":["A. 12","B. 24","C. 8","D. 6 "],"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 24; 54 ra th\u1eeba s\u1ed1 nguy\u00ean t\u1ed1 <br\/><b> B\u01b0\u1edbc 2: <\/b> Ch\u1ecdn ra 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, 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: $24 = 2^3 . 3$; $54 = 2 . 3^3$ <br\/> \u01afCLN(24; 54) = 2 . 3 = 6 <br\/> <span class='basic_pink'> V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: D. 6 <\/span> ","column":2}]}]},"correct":"","level":"1","hint":"","answer":"","type":"json","extra_type":"","time":"0","user_id":"0","test":"0","date":"2019-09-30 09:14:54"},{"id":"1753","post_id":"817","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":[[4]],"list":[{"point":5,"ques":"BCNN(40; 168 ) = ? ","select":["A. 168","B. 280","C. 720","D. 840 "],"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 40; 168 ra th\u1eeba s\u1ed1 nguy\u00ean t\u1ed1 <br\/><b> B\u01b0\u1edbc 2: <\/b> Ch\u1ecdn ra th\u1eeba s\u1ed1 nguy\u00ean t\u1ed1 chung v\u00e0 ri\u00eang <br\/> <b> B\u01b0\u1edbc 3: <\/b> L\u1eadp t\u00edch c\u00e1c th\u1eeba s\u1ed1 nguy\u00ean t\u1ed1 chung v\u00e0 ri\u00eang, m\u1ed7i th\u1eeba s\u1ed1 l\u1ea5y v\u1edbi s\u1ed1 m\u0169 l\u1edbn nh\u1ea5t c\u1ee7a n\u00f3 <\/span> <br\/><br\/> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span> <br\/> Ta c\u00f3: $40 = 2^3 . 5$; $168 = 2^3 . 3 . 7$ <br\/> $BCNN(40; 168) = 2^3 . 3 . 5 . 7 = 840$ <br\/> <span class='basic_pink'> V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: D. 840 <\/span> ","column":2}]}]},"correct":"","level":"1","hint":"","answer":"","type":"json","extra_type":"","time":"0","user_id":"0","test":"0","date":"2019-09-30 09:14:54"}]}