T\u01b0\u1edbng \u00f4ng, t\u01b0\u1edbng b\u00e0 l\u00e0 g\u00ec?<\/h2>\n
B\u1ed9 b\u00e0i Tam C\u00fac c\u00f3 32 l\u00e1 b\u00e0i, t\u01b0\u01a1ng t\u1ef1 tr\u00f2 ch\u01a1i c\u1edd t\u01b0\u1edbng, g\u1ed3m hai lo\u1ea1i qu\u00e2n l\u00e0 qu\u00e2n \u0111\u1ecf v\u00e0 qu\u00e2n \u0111en g\u1ed3m 16 qu\u00e2n \u0111\u1ecf v\u00e0 16 qu\u00e2n \u0111en. Trong m\u1ed9t b\u1ed9 m\u00e0u \u0111\u1ecf ho\u1eb7c \u0111en th\u00ec tr\u1eeb t\u01b0\u1edbng ch\u1ec9 c\u00f3 1 l\u00e1 v\u00e0 t\u1ed1t c\u00f3 5 l\u00e1 m\u1ed7i lo\u1ea1i qu\u00e2n, c\u00e1c qu\u00e2n kh\u00e1c \u0111\u1ec1u c\u00f3 2 l\u00e1. Qu\u00e2n b\u00e0i T\u01b0\u1edbng c\u1ee7a lo\u1ea1i qu\u00e2n \u0111\u1ecf \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 \u201ct\u01b0\u1edbng \u00f4ng\u201d. Qu\u00e2n b\u00e0i T\u01b0\u1edbng c\u1ee7a lo\u1ea1i qu\u00e2n \u0111en \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 \u201ct\u01b0\u1edbng b\u00e0\u201d.<\/p>\n
Gi\u1edbi thi\u1ec7u qua v\u1ec1 l\u00f4 k\u00e9p<\/h2>\n
\u0110\u1ec3 b\u1eaft \u0111\u01b0\u1ee3c k\u00e9p th\u00ec ch\u00fang ta c\u1ea7n ph\u1ea3i hi\u1ec3u v\u1ec1 kh\u00e1i ni\u1ec7m c\u1ee7a n\u00f3. Hi\u1ec7n nay c\u00f3 3 c\u00e1ch \u0111\u00e1nh k\u00e9p \u0111\u01b0\u1ee3c anh em kh\u00e1 \u01b0a chu\u1ed9ng l\u00e0 k\u00e9p b\u1eb1ng, k\u00e9p l\u1ec7ch, k\u00e9p \u00e2m. Nhi\u1ec7m v\u1ee5 c\u1ee7a ch\u00fang ta l\u00e0 \u0111i s\u00e2u t\u00ecm hi\u1ec3u t\u1eebng kh\u00e1i ni\u1ec7m n\u00e0y.<\/p>\n
K\u00e9p b\u1eb1ng: \u0110\u00e2y l\u00e0 c\u00e1ch ch\u01a1i ph\u1ed5 bi\u1ebfn nh\u1ea5t hi\u1ec7n nay b\u1edfi c\u00e1ch ch\u01a1i r\u1ea5t \u0111\u01a1n gi\u1ea3n. Khi ch\u1ecdn k\u00e9p b\u1eb1ng th\u00ec anh em c\u00f3 th\u1ec3 ch\u1ecdn m\u1ed9t trong c\u00e1c s\u1ed1: 00, 11, 22, 33, 44, 55, 66, 77, 88, 99. Ngo\u00e0i ra, anh em c\u0169ng ho\u00e0n to\u00e0n c\u00f3 th\u1ec3 ch\u01a1i d\u00e0n \u0111\u1ec1 l\u00e0 t\u1ea5t c\u1ea3 c\u00e1c s\u1ed1 tr\u00ean. N\u1ebfu l\u00f4 c\u00f3 v\u1ec1 s\u1ed1 n\u00e0o trong \u0111\u00e2y th\u00ec b\u1ea1n ho\u00e0n to\u00e0n c\u00f3 th\u1ec3 chi\u1ebfn th\u1eafng.<\/p>\n
K\u00e9p l\u1ec7ch: n\u1ebfu nh\u01b0 k\u00e9p b\u1eb1ng l\u00e0 nh\u1eefng s\u1ed1 c\u00f3 ch\u1eef s\u1ed1 h\u00e0ng ch\u1ee5c v\u00e0 h\u00e0ng \u0111\u01a1n v\u1ecb gi\u1ed1ng nhau th\u00ec k\u00e9p l\u1ec7ch c\u0169ng bao g\u1ed3m b\u1ed9 10 s\u1ed1 nh\u01b0ng l\u00e0 l\u1ed9n c\u1ee7a nhau bao g\u1ed3m: 05, 50, 16, 61, 27, 72, 38, 83, 49, 94<\/p>\n
K\u00e9p \u00e2m: \u0111\u00e2y l\u00e0 kh\u00e1i ni\u1ec7m r\u1ea5t \u00edt \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng khi \u0111\u00e1nh l\u00f4 \u0111\u1ec1. V\u1edbi c\u00e1ch \u0111\u00e1nh n\u00e0y anh em s\u1ebd s\u1eed d\u1ee5ng b\u00f3ng c\u1ee7a c\u00e1c con s\u1ed1 \u0111\u1ec3 \u0111\u00e1nh. Theo \u0111\u00f3 ch\u00fang ta c\u0169ng c\u00f3 \u0111\u01b0\u1ee3c b\u1ed9 s\u1ed1 l\u00e0 14, 41, 07, 70, 29, 92, 58, 85, 36, 63.<\/p>\n