Hi\u1ec3u th\u1ebf n\u00e0o l\u00e0 l\u00f4 k\u00e9p? C\u00e1ch b\u1eaft l\u00f4 k\u00e9p mi\u1ec1n b\u1eafc<\/figcaption><\/figure>\r\n<\/figure>\r\n<\/div>\r\n\r\n\r\n\r\nL\u00f4 k\u00e9p hi\u1ec7n nay \u0111\u01b0\u1ee3c chia th\u00e0nh r\u1ea5t nhi\u1ec1u d\u1ea1ng kh\u00e1c nhau l\u00e0 k\u00e9p l\u1ec7ch, k\u00e9p b\u1eb1ng v\u00e0 k\u00e9p \u00e2m.\u00a0<\/p>\r\n\r\n\r\n\r\n
L\u00f4 k\u00e9p b\u1eb1ng l\u00e0 con l\u00f4 m\u00e0 2 s\u1ed1 \u0111\u1ea7u v\u00e0 \u0111u\u00f4i gi\u1ed1ng h\u1ec7t nhau. Hi\u1ec7n t\u1ea1i c\u00f3 t\u1ea5t c\u1ea3 10 con l\u00f4 k\u00e9p b\u1eb1ng l\u00e0: 00 \u2013 11 \u2013 22 \u2013 33 \u2013 44 \u2013 55 \u2013 66 \u2013 77 \u2013 88 \u2013 99.\u00a0<\/p>\r\n\r\n\r\n\r\n
D\u00e2n ch\u01a1i l\u00f4 \u0111\u1ec1 mi\u1ec1n b\u1eafc th\u00ec hay \u00e1p d\u1ee5ng l\u00f4 k\u00e9p b\u1eb1ng, v\u00ec d\u1ea1ng n\u00e0y d\u1ec5 b\u1eaft h\u01a1n c\u1ea3. C\u00e1ch nh\u1eadn bi\u1ebft c\u0169ng r\u1ea5t \u0111\u01a1n gi\u1ea3n, ch\u1ec9 c\u1ea7n nh\u1eafc \u0111\u1ebfn l\u00f4 k\u00e9p b\u1eb1ng v\u00e0 c\u00e1ch b\u1eaft l\u00f4 k\u00e9p mi\u1ec1n b\u1eafc vip ng\u01b0\u1eddi ta s\u1ebd hi\u1ec3u \u0111\u00f3 l\u00e0 nh\u1eefng con s\u1ed1 n\u00e0o.<\/p>\r\n\r\n\r\n\r\n
L\u00f4 k\u00e9p l\u1ec7ch ngh\u0129a l\u00e0 s\u1ed1 n\u00e0y s\u1ebd l\u00e0 b\u00f3ng c\u1ee7a s\u1ed1 kia. V\u00ed d\u1ee5 s\u1ed1 l\u00f4 k\u00e9p l\u1ec7ch l\u00e0 AB th\u00ec A l\u00e0 b\u00f3ng c\u1ee7a B v\u00e0 B l\u00e0 b\u00f3ng c\u1ee7a A. C\u00e1c s\u1ed1 l\u00f4 k\u00e9p l\u1ec7ch hi\u1ec7n nay c\u00f3 05 \u2013 50, 16 \u2013 61, 27 \u2013 72, 38 \u2013 83, 49 \u2013 94.<\/p>\r\n\r\n\r\n\r\n
L\u00f4 k\u00e9p \u00e2m c\u00f3 ngh\u0129a l\u00e0 \u0111\u00e1nh c\u00e1c con m\u00e0 trong \u0111\u00f3 s\u1ed1 n\u00e0y l\u00e0 b\u00f3ng \u00e2m c\u1ee7a s\u1ed1 kia. C\u1ee5 th\u1ec3:<\/p>\r\n\r\n\r\n\r\n
\r\n- 0 l\u00e0 b\u00f3ng \u00e2m c\u1ee7a 7 v\u00e0 ng\u01b0\u1ee3c l\u1ea1i.<\/li>\r\n
- 1 l\u00e0 b\u00f3ng \u00e2m c\u1ee7a 4 v\u00e0 ng\u01b0\u1ee3c l\u1ea1i.<\/li>\r\n
- 2 l\u00e0 b\u00f3ng \u00e2m c\u1ee7a 9 v\u00e0 ng\u01b0\u1ee3c l\u1ea1i.<\/li>\r\n
- 3 l\u00e0 b\u00f3ng \u00e2m c\u1ee7a 6 v\u00e0 ng\u01b0\u1ee3c l\u1ea1i.<\/li>\r\n
- 5 l\u00e0 b\u00f3ng \u00e2m c\u1ee7a 8 v\u00e0 ng\u01b0\u1ee3c l\u1ea1i.<\/li>\r\n
- Ta c\u00f3 c\u00e1c c\u1eb7p l\u00f4 k\u00e9p \u00e2m l\u00e0 07 \u2013 70, 14 \u2013 41, 29 \u2013 92, 36 \u2013 63, 58 \u2013 85.<\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n
C\u00e1c c\u00e1ch b\u1eaft l\u00f4 k\u00e9p mi\u1ec1n b\u1eafc th\u00f4ng minh<\/strong><\/h2>\r\n\r\n\r\n\r\nQua t\u00ecm hi\u1ec3u ch\u00fang t\u00f4i \u0111\u00e3 t\u1ed5ng h\u1ee3p \u0111\u01b0\u1ee3c 3 c\u00e1ch b\u1eaft l\u00f4 k\u00e9p c\u1ef1c \u0111\u1ec9nh mi\u1ec1n B\u1eafc ph\u1ed5 bi\u1ebfn v\u00e0 \u0111em l\u1ea1i hi\u1ec7u qu\u1ea3 t\u1ed1t nh\u1ea5t.<\/p>\r\n\r\n\r\n\r\n
B\u1eaft l\u00f4 k\u00e9p mi\u1ec1n b\u1eafc theo gi\u1ea3i \u0111\u1eb7c bi\u1ec7t c\u1ee7a ng\u00e0y th\u1ee9 2<\/strong><\/h2>\r\n\r\n\r\n\r\n\r\n