D\u00e0n \u0111\u1ec1 ch\u1eb5n l\u1ebb, l\u1ebb l\u1ebb, ch\u1eb5n ch\u1eb5n, l\u1ebb ch\u1eb5n trong l\u00f4 \u0111\u1ec1 c\u00f3 c\u01a1 c\u1ea5u kh\u00e1 gi\u1ed1ng v\u1edbi c\u00e1c d\u00e0n \u0111\u1ec1 th\u1ea5p th\u1ea5p, th\u1ea5p cao, cao th\u1ea5p, cao cao \u0111\u00e3 \u0111\u01b0\u1ee3c \u0111\u1ec1 c\u1eadp \u1edf b\u00e0i vi\u1ebft tr\u01b0\u1edbc. C\u0169ng nh\u01b0 b\u00e0i vi\u1ebft tr\u01b0\u1edbc, ch\u00fang t\u00f4i ho\u00e0n to\u00e0n kh\u00f4ng \u0111\u1ec1 c\u1eadp \u0111\u1ebfn c\u00e1ch s\u1eed d\u1ee5ng c\u00e1c d\u00e0n \u0111\u1ec1 n\u00e0y. M\u00e0 ch\u1ec9 n\u00eau ra s\u1ed1 l\u01b0\u1ee3ng v\u00e0 chi ti\u1ebft c\u00e1c con s\u1ed1 \u1edf c\u00e1c d\u00e0n s\u1ed1 \u0111\u1ec3 tham kh\u1ea3o.<\/strong><\/p>\n C\u1edb s\u1edf h\u00ecnh th\u00e0nh d\u00e0n \u0111\u1ec1 ch\u1eb5n l\u1ebb ,l\u1ebb l\u1ebb, ch\u1eb5n ch\u1eb5n, l\u1ebb ch\u1eb5n ch\u00ednh l\u00e0 c\u00e1c con s\u1ed1 \u201cch\u1eb5n\u201d v\u00e0 \u201cl\u1ebb\u201d t\u1eeb 0 \u0111\u1ebfn 9:<\/p>\n D\u00e0n \u0111\u1ec1 ch\u1eb5n l\u1ebb g\u1ed3m c\u00f3 25 con. V\u1edbi s\u1ed1 h\u00e0ng ch\u1ee5c l\u00e0 s\u1ed1 ch\u1eb5n c\u00f2n s\u1ed1 h\u00e0ng \u0111\u01a1n v\u1ecb l\u00e0 s\u1ed1 l\u1ebb. D\u00e0n \u0111\u1ec1 ch\u1eb5n l\u1ebb g\u1ed3m c\u00e1c s\u1ed1 sau:<\/p>\n 01, 03, 05, 07, 09, 21, 23, 25, 27, 29, 41, 43, 45, 47, 49, 61, 63, 65, 67, 69, 81, 83, 85, 87, 89<\/p>\n <\/p>\n T\u01b0\u01a1ng t\u1ef1 nh\u01b0 d\u00e0n \u0111\u1ec1 ch\u1eb5n l\u1ebb. D\u00e0n \u0111\u1ec1 l\u1ebb ch\u1eb5n g\u1ed3m 25 s\u1ed1. Nh\u01b0ng c\u00e1c s\u1ed1 h\u00e0ng ch\u1ee5c l\u00e0 s\u1ed1 ch\u1eb5n c\u00f2n c\u00e1c s\u1ed1 h\u00e0ng \u0111\u01a1n v\u1ecb l\u1ea1i l\u00e0 s\u1ed1 l\u1ebb. Chi ti\u1ebft g\u1ed3m c\u00f3 c\u00e1c s\u1ed1:<\/p>\n 10, 12, 14, 16, 18, 30, 32, 34, 36, 38, 50, 52, 54, 56, 58, 70, 72, 74, 76, 78, 90, 92, 94, 96, 98<\/p>\n D\u00e0n \u0111\u1ec1 l\u1ebb l\u1ebb c\u0169ng g\u1ed3m 25 s\u1ed1 nh\u01b0 d\u00e0n \u0111\u1ec1 ch\u1eb5n l\u1ebb v\u00e0 d\u00e0n \u0111\u1ec1 l\u1ebb ch\u1eb5n. C\u00e1c s\u1ed1 n\u00e0y c\u00f3 ch\u1eef s\u1ed1 h\u00e0ng ch\u1ee5c v\u00e0 \u0111\u01a1n v\u1ecb \u0111\u1ec1u l\u00e0 c\u00e1c s\u1ed1 l\u1ebb. D\u00e0n \u0111\u1ec1 l\u1ebb l\u1ebb g\u1ed3m c\u00e1c s\u1ed1 sau:<\/p>\n 11, 13, 15, 17, 19, 31, 33, 35, 37, 39, 51, 53, 55, 57, 59, 71, 73, 75, 77, 79, 91, 93, 95, 97, 99<\/p>\n D\u00e0n \u0111\u1ec1 ch\u1eb5n ch\u1eb5n g\u1ed3m 25 s\u1ed1 c\u00f3 c\u1ea3 s\u1ed7 h\u00e0ng ch\u1ee5c v\u00e0 h\u00e0ng \u0111\u01a1n v\u1ecb l\u00e0 s\u1ed1 ch\u1eb5n. D\u00e0n \u0111\u1ec1 ch\u1eb5n ch\u1eb5n g\u1ed3m c\u00e1c s\u1ed1:<\/p>\n 00, 02, 04, 06, 08, 20, 22, 24, 26, 28, 40, 42, 44, 46, 48, 60, 62, 64, 66, 68, 80, 82, 84, 86, 88<\/p>\n \u0110\u00e2y c\u0169ng l\u00e0 d\u00e0n \u0111\u1ec1 cu\u1ed1i c\u00f9ng 4 d\u00e0n \u0111\u1ec1 ch\u1eb5n l\u1ebb, l\u1ebb l\u1ebb, ch\u1eb5n ch\u1eb5n, l\u1ebb ch\u1eb5n. Hi v\u1ecdng c\u00e1c b\u1ea1n s\u1ebd \u00e1p d\u1ee5ng th\u00e0nh c\u00f4ng c\u00e1c d\u00e0n \u0111\u1ec1 n\u00e0y v\u00e0o th\u1ef1c t\u1ebf \u0111\u00e1nh l\u00f4 \u0111\u1ec1. C\u00e1m \u01a1n c\u00e1c b\u1ea1n \u0111\u00e3 \u0111\u1ecdc b\u00e0i vi\u1ebft. Ch\u00fac c\u00e1c b\u1ea1n lu\u00f4n kh\u1ecfe m\u1ea1nh v\u00e0 g\u1eb7p nhi\u1ec1u may m\u1eafn!<\/p>\n<\/div>\n\n
D\u00c0N \u0110\u1ec0 CH\u1eb4N L\u1eba<\/strong><\/span><\/h2>\n
D\u00c0N \u0110\u1ec2 L\u1eba CH\u1eb4N<\/strong><\/span><\/h2>\n
D\u00c0N \u0110\u1ec0 L\u1eba L\u1eba<\/span><\/strong><\/h2>\n
D\u00c0N \u0110\u1ec0 CH\u1eb4N CH\u1eb4N<\/span><\/strong><\/h2>\n
\n\nD\u00e0n \u0111\u1ec1 ch\u1eb5n l\u1ebb, l\u1ebb l\u1ebb, ch\u1eb5n ch\u1eb5n, l\u1ebb ch\u1eb5n l\u00e0 g\u00ec, g\u1ed3m nh\u1eefng s\u1ed1 n\u00e0o?<\/h1>\n<\/header>\n