\n
D\u00e0n \u0111\u1ec1 \u0111\u1ea7u cao \u0111\u00edt ch\u1eb5n v\u00e0 d\u00e0n \u0111\u1ec1 \u0111\u1ea7u cao \u0111\u00edt l\u1ebb l\u00e0 2 d\u00e0n \u0111\u1ec1 t\u1ea1o b\u1edfi nh\u00f3m s\u1ed1 cao th\u1ea5p v\u00e0 nh\u00f3m s\u1ed1 ch\u1eb5n l\u1ebb. T\u00f9y thu\u1ed9c v\u00e0o nh\u1eadn \u0111\u1ecbnh v\u1ec1 c\u1ea7u c\u1ee7a m\u1ed7i ng\u01b0\u1eddi th\u00ec 2 d\u00e0n \u0111\u1ec1 n\u00e0y c\u00f3 th\u1ec3 \u00e1p d\u1ee5ng \u0111\u01b0\u1ee3c v\u00e0o nh\u1eefng tr\u01b0\u1eddng h\u1ee3p nh\u1ea5t \u0111\u1ecbnh. V\u1eady nh\u1eefng s\u1ed1 \u0111\u1ec1, d\u00e0n \u0111\u1ec1 \u0111\u1ea7u cao \u0111\u00edt ch\u1eb5n v\u00e0 \u0111\u1ea7u cao \u0111\u00edt l\u1ebb g\u1ed3m nh\u1eefng s\u1ed1 n\u00e0o? H\u00e3y t\u00ecm hi\u1ec3u c\u00f9ng ch\u00fang t\u00f4i \u1edf b\u00e0i vi\u1ebft n\u00e0y b\u1ea1n nh\u00e9.<\/p>\n
<\/p>\n
Nh\u01b0 \u1edf b\u00e0i vi\u1ebft d\u00e0n \u0111\u1ec1 th\u1ea5p th\u1ea5p \u2013 th\u1ea5p cao \u2013 cao th\u1ea5p \u2013 cao cao ta c\u00f3:<\/p>\n
\nNh\u00f3m s\u1ed1 th\u1ea5p g\u1ed3m 5 ch\u1eef s\u1ed1: 0, 1, 2, 3, 4<\/em><\/li>\nNh\u00f3m s\u1ed1 cao c\u0169ng g\u1ed3m 5 ch\u1eef s\u1ed1: 5, 6, 7, 8, 9<\/em><\/li>\n<\/ul>\nTa c\u0169ng c\u00f3 2 nh\u00f3m s\u1ed1 ch\u1eb5n v\u00e0 l\u1ebb nh\u01b0 sau:<\/p>\n
\nNh\u00f3m s\u1ed1 ch\u1eb5n: 0, 2, 4, 6, 8<\/em><\/li>\nNh\u00f3m s\u1ed1 l\u1ebb: 1, 3, 5, 7, 9<\/em><\/li>\n<\/ul>\nT\u1eeb 2 nh\u00f3m s\u1ed1 n\u00e0y, ch\u1ec9 c\u1ea7n thay \u0111\u1ed5i c\u00e1ch gh\u00e9p s\u1ed1 ta c\u00f3 th\u00eam 2 d\u00e0n \u0111\u1ec1 m\u1edbi sau.<\/p>\n
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\n\nD\u00c0N \u0110\u1ec0 \u0110\u1ea6U CAO \u0110\u00cdT CH\u1eb4N<\/li>\n D\u00c0N \u0110\u1ec0 \u0110\u1ea6U CAO \u0110\u00cdT L\u1eba<\/li>\n \u0110\u1ea6U TH\u1ea4P \u0110\u00cdT CH\u1eb4N<\/li>\n \u0110\u1ea6U TH\u1ea4P \u0110\u00cdT L\u1eba<\/li>\n<\/ul>\n<\/nav>\n<\/div>\n<\/span>D\u00c0N \u0110\u1ec0 \u0110\u1ea6U CAO \u0110\u00cdT CH\u1eb4N<\/strong><\/h2>\n\u0110\u00e2y l\u00e0 t\u1eadp h\u1ee3p nh\u1eefng s\u1ed1 c\u00f3 s\u1ed1 h\u00e0ng ch\u1ee5c thu\u1ed9c nh\u00f3m s\u1ed1 cao (\u0111\u1ea7u cao). V\u00e0 ch\u1eef s\u1ed1 h\u00e0ng \u0111\u01a1n v\u1ecb thu\u1ed9c nh\u00f3m s\u1ed1 ch\u1eb5n( \u0111\u00edt ch\u1eb5n). V\u1eady d\u00e0n \u0111\u1ec1 \u0111\u1ea7y cao \u0111\u00edt ch\u1eb5n g\u1ed3m 25 s\u1ed1 sau:<\/p>\n
50,52,54,56,58,60,62,64,66,68,70,72,74,76,78,80,82,84,86,88,90,92,94,96,98<\/p>\n
<\/span>D\u00c0N \u0110\u1ec0 \u0110\u1ea6U CAO \u0110\u00cdT L\u1eba<\/strong><\/h2>\nT\u01b0\u01a1ng t\u1ef1 nh\u01b0 tr\u00ean. D\u00e0n \u0111\u1ec1 \u0111\u1ea7u cao \u0111\u00edt l\u1ebb c\u00f3 ch\u1eef s\u1ed1 h\u00e0ng ch\u1ee5c thu\u1ed9c nh\u00f3m cao ( \u0111\u1ea7u cao). V\u00e0 ch\u1eef s\u1ed1 h\u00e0ng \u0111\u01a1n v\u1ecb thu\u1ed9c nh\u00f3m l\u1ebb (\u0111\u00edt l\u1ebb). D\u00e0n \u0111\u1ec1 n\u00e0y g\u1ed3m 25 s\u1ed1 d\u01b0\u1edbi \u0111\u00e2y:<\/p>\n
51,53,55,57,59,61,63,65,67,69,71,73,75,77,79,81,83,85,87,89,91,93,95,97,99<\/p>\n
Ngo\u00e0ihai d\u00e0n \u0111\u1ec3 k\u1ec3 tr\u00ean th\u00ec ta c\u00f2n c\u00f3 th\u1ec3 \u0111\u1ea3o v\u1ecb tr\u00ed c\u1ee7a c\u00e1c b\u1ed9 s\u1ed1 v\u00e0 c\u00f3 th\u00eam c\u00e1c d\u00e0n:<\/p>\n
<\/p>\n
<\/span>\u0110\u1ea6U TH\u1ea4P \u0110\u00cdT CH\u1eb4N<\/strong><\/h2>\nNgo\u00e0i 2 d\u00e0n \u0111\u1ea7u cao \u0111\u00edt ch\u1eb5n v\u00e0 \u0111\u1ea7u cao \u0111\u00edt l\u1ebb. Ta c\u00f2n c\u00f3 th\u1ec3 \u0111\u1ea3o v\u1ecb tr\u00ed c\u1ee7a c\u00e1c b\u1ed9 s\u1ed1 ta c\u00f3 th\u00eam d\u00e0n \u0111\u1ec1 \u0111\u1ea7u th\u1ea5p \u0111\u00edt ch\u1eb5n:<\/p>\n
00,02,04,06,08,10,12,14,16,18,20,22,24,26,28,30,32,34,36,38,40,42,44,46,48<\/p>\n
<\/span>\u0110\u1ea6U TH\u1ea4P \u0110\u00cdT L\u1eba<\/strong><\/h2>\nNgo\u00e0i 2 d\u00e0n \u0111\u1ea7u cao \u0111\u00edt ch\u1eb5n v\u00e0 \u0111\u1ea7u cao \u0111\u00edt l\u1ebb. Ta c\u00f2n c\u00f3 th\u1ec3 \u0111\u1ea3o v\u1ecb tr\u00ed c\u1ee7a c\u00e1c b\u1ed9 s\u1ed1 ta c\u00f3 th\u00eam d\u00e0n \u0111\u1ec1 \u0111\u1ea7u th\u1ea5p \u0111\u00edt l\u1ebb:<\/p>\n
01,03,05,07,09,11,13,15,17,19,21,23,25,27,29,31,33,35,37,39,41,43,45,47,49<\/p>\n
Khi \u0111\u00e1nh c\u00e1c d\u00e0n \u0111\u1ec1 n\u00e0y ta ch\u1ec9 c\u1ea7n copy v\u00e0 paste v\u00e0o khung nh\u1eadp s\u1ed1 c\u1ee7a ch\u00fang t\u00f4i. Ch\u00fac c\u00e1c b\u1ea1n g\u1eb7p nhi\u1ec1u may m\u1eafn v\u00e0 th\u00e0nh c\u00f4ng.<\/p>\n<\/div>\n