{"common":{"save":0,"post_id":"4895","level":3,"total":10,"point":10,"point_extra":0},"segment":[{"id":"8875","post_id":"4895","mon_id":"1158113","chapter_id":"1158138","question":"<p>\u0110i\u1ec1n s\u1ed1 thích h\u1ee3p vào ch\u1ed7 tr\u1ed1ng.<\/p><p>\u01af\u1edbc chung l\u1edbn nh\u1ea5t c\u1ee7a 560 và 980 là : <input class=\"tim_x input_number\" tpl=\"dien_so\" type=\"text\"\/><\/p><h3> <\/h3>","options":"","correct":["[\"140\"]"],"level":"3","hint":"","answer":"<p>Ta có:<\/p><p>560 = 2<span class=\"math-tex\">$^4$<\/span> . 5 . 7<\/p><p>980 = 2<span class=\"math-tex\">$^2$<\/span> . 5 . 7<span class=\"math-tex\">$^2$<\/span><\/p><p>Suy ra \u01afCLN(560, 980) = 2<span class=\"math-tex\">$^2$<\/span> . 5 . 7 = 140<\/p><p>V\u1eady s\u1ed1 c\u1ea7n \u0111i\u1ec1n là <span style=\"color:#16a085;\"><strong>140<\/strong><\/span><\/p>","type":"blank","extra_type":"","time":"0","user_id":"132","test":"1","date":"2021-10-09 14:07:12"},{"id":"8877","post_id":"4895","mon_id":"1158113","chapter_id":"1158138","question":"<p>Phân tích s\u1ed1 <strong>1980<\/strong> ra th\u1eeba s\u1ed1 nguyên t\u1ed1.<\/p>","options":["1980 = 2<span class=\"math-tex\">$^2$<\/span> . 9 . 5 . 11","1980 = 4 . 3<span class=\"math-tex\">$^2$<\/span> . 5 . 11","1980 = 2<span class=\"math-tex\">$^2$<\/span> . 3<span class=\"math-tex\">$^2$<\/span> . 5 . 11"],"correct":"3","level":"3","hint":"","answer":"<p>Phân tích s\u1ed1 <strong>1980<\/strong> ra th\u1eeba s\u1ed1 nguyên t\u1ed1.<\/p><p>1980 = 2<span class=\"math-tex\">$^2$<\/span> . 9 . 5 . 11 <span style=\"color:#e74c3c;\">Sai<\/span> vì 9 không là s\u1ed1 nguyên t\u1ed1<\/p><p>1980 = 4 . 3<span class=\"math-tex\">$^2$<\/span> . 5 . 11 <span style=\"color:#e74c3c;\">Sai<\/span> vì 4 không là s\u1ed1 nguyên t\u1ed1<\/p><p>1980 = 2<span class=\"math-tex\">$^2$<\/span> . 3<span class=\"math-tex\">$^2$<\/span> . 5 . 11 <span style=\"color:#16a085;\">\u0110úng<\/span><\/p><p>V\u1eady \u0111áp án \u0111úng là <span style=\"color:#16a085;\"><strong>1980 = 2<span class=\"math-tex\">$^2$<\/span> . 3<span class=\"math-tex\">$^2$<\/span> . 5 . 11<\/strong><\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"132","test":"1","date":"2021-10-09 14:11:17","option_type":"math","len":0},{"id":"8879","post_id":"4895","mon_id":"1158113","chapter_id":"1158138","question":"<p>\u01af\u1edbc chung l\u1edbn nh\u1ea5t c\u1ee7a 1024 và 1200 là :<\/p>","options":["8","4","16"],"correct":"3","level":"3","hint":"","answer":"<p>Ta có:<\/p><p>1024 = 2<span class=\"math-tex\">$^{10}$<\/span><\/p><p>1200 = 2<span class=\"math-tex\">$^4$<\/span> . 3 . 5<span class=\"math-tex\">$^2$<\/span> <\/p><p>Suy ra \u01afCLN(1024, 1200) = 2<span class=\"math-tex\">$^4$<\/span> = 16<\/p><p>V\u1eady \u0111áp án \u0111úng là <span style=\"color:#16a085;\"><strong>16<\/strong><\/span><\/p>","type":"choose","extra_type":"sheep","time":"0","user_id":"132","test":"1","date":"2021-10-09 14:16:17","option_type":"txt","len":0}]}
