K\u00e9p l\u1ec7ch l\u00e0 g\u00ec<\/figcaption><\/figure>\nS\u00e1t k\u00e9p<\/h2>\n
S\u00e1t k\u00e9p hi\u1ec3u \u0111\u01a1n gi\u1ea3n l\u00e0 s\u1ed1 li\u1ec1n k\u1ec1 tr\u00ean v\u00e0 li\u1ec1n k\u1ec1 d\u01b0\u1edbi c\u1ee7a s\u1ed1 k\u00e9p tr\u00ean tr\u1ee5c s\u1ed1, hay n\u00f3i c\u00e1ch kh\u00e1c l\u00e0 l\u1ea5y s\u1ed1 k\u00e9p c\u00e1c b\u1ea1n +1 v\u00e0 -1 s\u1ebd ra \u0111\u01b0\u1ee3c 2 s\u1ed1 s\u00e1t k\u00e9p kh\u00e1c. Tuy nhi\u00ean do ch\u00fang ta c\u00f3 c\u1ea3 k\u00e9p b\u1eb1ng v\u00e0 k\u00e9o l\u1ec7ch n\u00ean s\u00e1t k\u00e9p c\u0169ng \u0111\u01b0\u1ee3c chia l\u00e0m 2 b\u1ed9 s\u1ed1 l\u00e0 s\u00e1t k\u00e9p b\u1eb1ng v\u00e0 s\u00e1t k\u00e9p l\u1ec7ch.<\/p>\n
S\u00e1t k\u00e9p b\u1eb1ng<\/h2>\n
B\u1ed9 s\u1ed1 s\u00e1t k\u00e9p b\u1eb1ng g\u1ed3m 20 s\u1ed1.<\/strong> Trong b\u1ed9 s\u1ed1 n\u00e0y c\u00f3 nhi\u1ec1u n\u01a1i kh\u00f4ng t\u00ednh 09<\/strong> v\u00e0 90<\/strong> l\u00e0 k\u00e9p b\u1eb1ng n\u00ean c\u00e1ch b\u1ea1n c\u1ea7n h\u1ecfi tr\u01b0\u1edbc khi ch\u01a1i.<\/p>\nG\u1ed3m c\u00e1c b\u1ed9 s\u1ed1 sau<\/p>\n
01,10,12, 21, 23, 32, 34, 43, 54, 45, 65, 56, 67, 76, 78, 87, 89, 98, 09, 90<\/strong><\/p><\/blockquote>\nS\u00e1t k\u00e9p l\u1ec7ch<\/h2>\n
T\u01b0\u01a1ng t\u1ef1 s\u00e1t k\u00e9p b\u1eb1ng, b\u1ed9 s\u00e1t k\u00e9p l\u1ec7ch c\u0169ng c\u00f3 20 s\u1ed1 nh\u01b0 sau:<\/p>\n
04, 06, 49, 51, 15, 17, 60, 62, 26, 28, 71, 73, 37, 39, 82, 84, 48, 50, 93, 95<\/strong><\/p><\/blockquote>\nNh\u01b0 v\u1eady c\u00f3 th\u1ec3 th\u1ea5y v\u1ec1 sau ng\u01b0\u1eddi ta c\u00e0ng s\u00e1ng t\u1ea1o th\u00eam nhi\u1ec1u b\u1ed9 s\u1ed1 k\u00e9p kh\u00e1c \u0111\u1ec3 ph\u1ee5c v\u1ee5 nhu c\u1ea7u soi c\u1ea7u c\u1ee7a m\u00ecnh.<\/p>\n