Chi\u1ec1u chi\u1ec1u l\u00e0m v\u00e0i con \u0111\u1ec1 v\u1eeba gi\u1ea3i tr\u00ed, v\u1eeba ki\u1ebfm th\u00eam ti\u1ec1n l\u00e0 m\u1ed9t c\u00e1ch th\u1ee9c kh\u00e1 hay ho. Nhi\u1ec1u anh em chia s\u1ebb ch\u01a1i cho vui m\u00e0 l\u1ea1i v\u00e0o b\u1edd nhanh l\u1eafm lu\u00f4n. Anh em m\u1edbi ch\u01a1i th\u00ec sao, t\u1ea5t nhi\u00ean l\u00e0 ph\u1ea3i h\u1ecdc h\u1ecfi t\u1eeb t\u1eeb r\u1ed3i. V\u00ed d\u1ee5 nh\u01b0 c\u00e1ch b\u1eaft \u0111\u1ec1 ch\u1eb5n l\u1ebb ch\u1eb3ng h\u1ea1n. Ph\u1ea3i t\u00ecm hi\u1ec3u xem n\u00f3 l\u00e0 g\u00ec r\u1ed3i c\u00e1ch th\u1ee9c ch\u01a1i sao m\u1edbi v\u00f4 s\u1ed1 \u0111\u01b0\u1ee3c ch\u1ee9.<\/span><\/p>\n Ki\u1ec3u ch\u01a1i kh\u00e1 ph\u1ed5 bi\u1ebfn v\u1edbi c\u00e1c anh em trong gi\u1edbi. Kh\u00f4ng qu\u00e1 ph\u1ee9c t\u1ea1p, kh\u00e1 \u0111\u01a1n gi\u1ea3n v\u00e0 d\u1ec5 hi\u1ec3u. M\u1ed9t c\u00e1ch \u0111\u01a1n gi\u1ea3n nh\u1ea5t th\u00ec \u0111\u00e2y l\u00e0 c\u00e1ch ch\u01a1i anh em ch\u1ecdn ra s\u1ed1 c\u00f3 2 s\u1ed1 c\u00f3 d\u1ea1ng ch\u1eb5n ho\u1eb7c l\u00e0 l\u1ebb \u0111\u1ec3 \u0111\u00e1nh. S\u1ed1 ch\u1eb5n l\u00e0 0,2,4,6,8 v\u00e0 l\u1ebb 1,3,5,7,9<\/span><\/p>\n C\u00f3 nhi\u1ec1u c\u00e1ch ch\u01a1i \u0111\u1ec1 c\u0169ng nh\u01b0 ph\u01b0\u01a1ng ph\u00e1p soi \u0111\u1ec1<\/strong><\/em>. Tuy nhi\u00ean b\u00ean d\u01b0\u1edbi \u0111\u00e2y l\u00e0 nh\u1eefng c\u00e1ch ch\u01a1i \u0111\u00e3 \u0111\u01b0\u1ee3c ch\u00fang t\u00f4i t\u1ed5ng h\u1ee3p l\u1ea1i c\u00f3 t\u1ef7 l\u1ec7 \u0103n ti\u1ec1n cao nh\u1ea5t. T\u1ea5t nhi\u00ean n\u1ebfu anh em bi\u1ebft th\u00eam nhi\u1ec1u c\u00e1ch kh\u00e1c nhau th\u00ec \u0111\u1ec1u c\u00f3 th\u1ec3 th\u1eed ha. Ch\u1ec9 l\u00e0 \u0111\u1ec3 tr\u00e1nh m\u1ea5t th\u00eam th\u1eddi gian t\u00ecm hi\u1ec3u c\u00e1ch n\u00e0y c\u00e1ch n\u1ecd r\u1ed3i \u0111\u00e1nh th\u1eed ki\u1ec3u n\u00e0y ki\u1ec3u kia. Ch\u00fang t\u00f4i t\u1ed5ng h\u1ee3p lu\u00f4n nh\u1eefng c\u00e1ch \u0111\u00e1nh nhanh v\u1ec1 b\u1edd nh\u1ea5t. Anh em ch\u1ec9 vi\u1ec7c \u00e1p d\u1ee5ng v\u00e0 \u0111\u00e1nh \u0111\u1ec3 ki\u1ebfm ti\u1ec1n th\u00f4i.<\/span><\/p>\n 2 con s\u1ed1 chia \u0111\u01b0\u1ee3c cho 2 l\u00e0 s\u1ed1 ch\u1eb5n, v\u00e0 2 con s\u1ed1 kh\u00f4ng chia \u0111\u01b0\u1ee3c cho 2 ch\u00ednh l\u00e0 s\u1ed1 l\u1ebb. Ki\u1ebfn th\u1ee9c to\u00e1n h\u1ecdc c\u1ef1c k\u1ef3 c\u01a1 b\u1ea3n m\u00e0 kh\u00f4ng anh em n\u00e0o l\u1ea1i kh\u00f4ng bi\u1ebft. V\u1edbi c\u00e1ch t\u00ednh n\u00e0y ch\u00fang ta s\u1ebd c\u00f3 nh\u1eefng c\u1eb7p s\u1ed1 c\u01a1 b\u1ea3n sau:<\/span><\/p>\n \u2013<\/span> <\/span> S\u1ed1 ch\u1eb5n ch\u1eb5n l\u00e0 c\u1eb7p s\u1ed1 c\u00f3 nh\u1eefng s\u1ed1 \u0111\u1ec1u chia h\u1ebft cho 2: 00 \u2013 02 \u2013 04 \u2013 06 \u2013 08 \u2013 20 \u2013 22 \u2013 24 \u2013 26 \u2013 28 \u2013 40 \u2013 42 \u2013 44 \u2013 46 \u2013 48 \u2013 60 \u2013 62 \u2013 64 \u2013 66 \u2013 68 \u2013 80 \u2013 82 \u2013 84 \u2013 86 \u2013 88<\/span><\/p>\n \u2013<\/span> <\/span> C\u1eb7p s\u1ed1 l\u1ebb l\u1ebb t\u01b0\u01a1ng t\u1ef1 l\u00e0 c\u1eb7p c\u00f3 2 s\u1ed1 kh\u00f4ng chia h\u1ebft cho 2: 11 \u2013 13 \u2013 15 \u2013 17 \u2013 19 \u2013 31 \u2013 33 \u2013 35 \u2013 37 \u2013 39 \u2013 51 \u2013 53 \u2013 55 \u2013 57 \u2013 59 \u2013 71 \u2013 73 \u2013 75 \u2013 77 \u2013 79 \u2013 91 \u2013 93 \u2013 95 \u2013 97 \u2013 99<\/span><\/p>\n \u2013<\/span> <\/span> C\u1eb7p ch\u1eb5n l\u1ebb g\u1ed3m 1 s\u1ed1 ch\u1eb5n v\u00e0 1 s\u1ed1 l\u1ebb: 01 \u2013 03 \u2013 05 \u2013 07 \u2013 09 \u2013 21 \u2013 23 \u2013 25 \u2013 27 \u2013 29 \u2013 41 \u2013 43 \u2013 45 \u2013 47 \u2013 49 \u2013 61 \u2013 63 \u2013 65 \u2013 67 \u2013 69 \u2013 81 \u2013 83 \u2013 85 \u2013 87 \u2013 89<\/span><\/p>\n \u2013<\/span> <\/span> L\u1ebb ch\u1eb5n g\u1ed3m s\u1ed1 l\u1ebb v\u00e0 s\u1ed1 ch\u1eb5n: 10 \u2013 12 \u2013 14 \u2013 16 \u2013 18 \u2013 30 \u2013 32 \u2013 34 \u2013 36 \u2013 38 \u2013 50 \u2013 52 \u2013 54 \u2013 56 \u2013 58 \u2013 70 \u2013 72 \u2013 74 \u2013 76 \u2013 78 \u2013 90 \u2013 92 \u2013 94 \u2013 96 \u2013 98<\/span><\/p>\n <\/p>\n C\u00e1ch b\u1eaft \u0111\u1ec1 ch\u1eb5n l\u1ebb ph\u1ed5 bi\u1ebfn n\u1eefa l\u00e0 t\u00ednh theo t\u1ed5ng. Ngh\u0129a l\u00e0 t\u1ed5ng c\u1ee7a 2 con s\u1ed1 ch\u1eb5n ho\u1eb7c l\u1ebb.C\u00e1ch t\u00ednh n\u00e0y t\u1ea1o ra \u0111\u01b0\u1ee3c 1 d\u00e0n \u0111\u1ec1 v\u1edbi 100 s\u1ed1 cho anh em tha h\u1ed3 ch\u1ecdn l\u1ef1a \u0111\u1ec3 v\u1ec1 b\u1edd.<\/span><\/p>\n \u0110\u01a1n gi\u1ea3n h\u01a1n nhi\u1ec1u c\u00e1ch soi \u0111\u1ec1 kh\u00e1c. Anh em ch\u1ec9 c\u1ea7n l\u1ea5y t\u1ed5ng c\u1ee7a s\u1ed1 \u0111\u1ea7u v\u00e0 s\u1ed1 cu\u1ed1i c\u1ee7a gi\u1ea3i \u0111\u1eb7c bi\u1ec7t c\u1ee7a ng\u00e0y Ch\u1ee7 Nh\u1eadt l\u00e0 \u0111\u01b0\u1ee3c. T\u1ed5ng s\u1ed1 n\u00e0o m\u00ecnh nu\u00f4i s\u1ed1 \u1ea5y l\u00e0 xong.<\/span><\/p>\n V\u00ed d\u1ee5: Ch\u1ee7 nh\u1eadt v\u1eeba r\u1ed3i gi\u1ea3i \u0111\u1eb7c bi\u1ec7t v\u1ec1 92857, ta c\u00f3 9+7= 16. L\u1ea5y s\u1ed1 n\u00e0y nu\u00f4i th\u00f4i ch\u1ee9 ch\u1edd g\u00ec n\u1eefa.<\/span><\/p>\n V\u1edbi ki\u1ec3u t\u00ednh \u0111\u1ec1 n\u00e0y, anh em ch\u1ecdn \u0111\u1ec1 ng\u00e0y th\u1ee9 m\u1ea5y v\u00e0 ng\u00e0y n\u00e0o th\u00ec ph\u1ea3i bi\u1ebft. Sau \u0111\u00f3 l\u1ea5y t\u1ed5ng c\u1ee7a th\u1ee9 v\u00e0 ng\u00e0y \u0111\u00f3 \u0111\u1ec3 t\u00ednh ra l\u1ebb hay ch\u1eb5n. Ti\u1ebfp \u0111\u00f3 anh em l\u1ea5y s\u1ed1 \u1edf gi\u1eefa c\u1ee7a gi\u1ea3i \u0111\u1eb7c bi\u1ec7t xem \u0111\u00f3 l\u00e0 s\u1ed1 g\u00ec \u0111\u1ec3 quy\u1ebft \u0111\u1ecbnh l\u1ebb hay ch\u1eb5n.<\/span><\/p>\n T\u1ea7n su\u1ea5t \u0111\u1ec3 v\u1ec1 l\u00f4 n\u00f3i d\u1ec5 c\u0169ng d\u1ec5 m\u00e0 n\u00f3i kh\u00f3 c\u0169ng kh\u00e1 kh\u00f3. N\u1ebfu soi kh\u00f4ng \u0111\u00fang s\u1ed1 th\u00ec coi nh\u01b0 toang m\u1ea5t r\u1ed3i. Anh em h\u00e3y l\u1ea5y c\u1ea3 s\u1ed1 l\u00f4 gan \u0111\u1ec3 coi th\u1eed s\u1ed1 n\u00e0o g\u1ea7n gi\u1ed1ng \u0111\u1ec1 v\u1ec1 \u0111\u1ec1.<\/span><\/p>\n V\u00ed d\u1ee5: k\u1ebft qu\u1ea3 x\u1ed5 s\u1ed1 \u00be v\u1ec1 s\u1ed1 57 gan 536. T\u1ed5ng l\u00f4 gan l\u00e0 5+7=13. Ti\u1ebfp \u0111\u00f3 l\u1eadp ngay d\u00e0n \u0111\u1ec1 v\u1edbi t\u1ed5ng l\u1ebb 3 ng\u00e0y.<\/span><\/p>\n N\u00f3i chung c\u00e1ch b\u1eaft \u0111\u1ec1 ch\u1eb5n l\u1ebb kh\u00f4ng ph\u1ea3i l\u00e0 c\u00e1ch \u0111\u00e1nh d\u1ec5. \u0110\u1ec3 c\u00f3 th\u1ec3 v\u1ec1 b\u1edd \u0111\u01b0\u1ee3c anh em c\u1ea7n v\u1eadn d\u1ee5ng nhi\u1ec1u ph\u01b0\u01a1ng ph\u00e1p v\u1edbi nhau. T\u00ednh to\u00e1n th\u1eadt l\u00e0 k\u1ef9 \u0111\u1ec3 c\u00f3 th\u1ec3 t\u00ednh ra \u0111\u01b0\u1ee3c con s\u1ed1 ch\u00ednh x\u00e1c. Tr\u00e1nh soi \u0111\u1ea1i, t\u00ednh \u1ea9u. N\u00f3i ch\u1edb nhi\u1ec1u anh em c\u00f3 kinh nghi\u1ec7m, tinh to\u00e1n k\u1ef9 l\u01b0\u1ee1ng c\u00f2n toang hu\u1ed1ng h\u1ed3 kh\u00f4ng ch\u1ecbu xem x\u00e9t k\u1ef9. L\u1ea1i c\u00f2n \u0111\u00e1nh \u0111\u1ea1i th\u00ec kh\u1ea3 n\u0103ng l\u1ed7 l\u00e0 cao ch\u1ee9 n\u00f3i g\u00ec c\u00f3 th\u1ec3 ki\u1ebfm \u0111\u01b0\u1ee3c l\u1ee3i nhu\u1eadn t\u1eeb m\u1ea5y b\u1ed9 m\u00f4n n\u00e0y.<\/span><\/p>\n<\/div>\n<\/div>\n<\/article>\n<\/div>\n <\/p>\n<\/div>\n <\/p>\n<\/div>\n soi c\u1ea7u b\u1ea1ch th\u1ee7 l\u00f4 2 nh\u00e1y mb v\u00edp 1 ng\u00e0y duy nh\u1ea5t<\/a><\/strong><\/p>\n soi c\u1ea7u b\u1ea1ch th\u1ee7 l\u00f4 mb v\u00edp 1 ng\u00e0y duy nh\u1ea5t<\/a><\/strong><\/p>\n soi c\u1ea7u song th\u1ee7 l\u00f4 mb v\u00edp 1 ng\u00e0y duy nh\u1ea5t<\/a><\/strong><\/p>\n soi c\u1ea7u b\u1ea1ch th\u1ee7 l\u00f4 k\u00e9p mb v\u00edp 1 ng\u00e0y duy nh\u1ea5t<\/a><\/strong><\/p>\n soi c\u1ea7u song th\u1ee7 l\u00f4 k\u00e9p mb v\u00edp 1 ng\u00e0y duy nh\u1ea5t<\/a><\/strong><\/p>\n soi c\u1ea7u b\u1ea1ch th\u1ee7 \u0111\u1ec1 mb v\u00edp 1 ng\u00e0y duy nh\u1ea5t<\/a><\/strong><\/p>\n soi c\u1ea7u song th\u1ee7 \u0111\u1ec1 mb v\u00edp 1 ng\u00e0y duy nh\u1ea5t<\/a><\/strong><\/p>\n soi c\u1ea7u d\u00e0n \u0111\u1ec1 4 s\u1ed1 mb v\u00edp 1 ng\u00e0y duy nh\u1ea5t<\/a><\/strong><\/p>\n soi c\u1ea7u d\u00e0n \u0111\u1ec1 6 s\u1ed1 mb v\u00edp 1 ng\u00e0y duy nh\u1ea5t<\/a><\/strong><\/p>\n soi c\u1ea7u d\u00e0n \u0111\u1ec1 8 s\u1ed1 mb v\u00edp 1 ng\u00e0y duy nh\u1ea5t<\/a><\/strong><\/p>\n soi c\u1ea7u d\u00e0n \u0111\u1ec1 10 s\u1ed1 mb v\u00edp 1 ng\u00e0y duy nh\u1ea5t<\/a><\/strong><\/p>\n soi c\u1ea7u d\u00e0n l\u00f4 4 s\u1ed1 mb v\u00edp 1 ng\u00e0y duy nh\u1ea5t<\/a><\/strong><\/p>\n soi c\u1ea7u d\u00e0n l\u00f4 6 s\u1ed1 mb v\u00edp 1 ng\u00e0y duy nh\u1ea5t<\/a><\/strong><\/p>\n soi c\u1ea7u d\u00e0n l\u00f4 8 s\u1ed1 mb v\u00edp 1 ng\u00e0y duy nh\u1ea5t<\/a><\/strong><\/p>\n soi c\u1ea7u d\u00e0n l\u00f4 xi\u00ean 2 mb v\u00edp 1 ng\u00e0y duy nh\u1ea5t<\/a><\/strong><\/p>\n soi c\u1ea7u d\u00e0n l\u00f4 xi\u00ean 3 mb v\u00edp 1 ng\u00e0y duy nh\u1ea5t<\/a><\/strong><\/p>\n soi c\u1ea7u d\u00e0n l\u00f4 xi\u00ean 4 mb v\u00edp 1 ng\u00e0y duy nh\u1ea5t<\/a><\/strong><\/p>\n soi c\u1ea7u 3 c\u00e0ng mb v\u00edp 1 ng\u00e0y duy nh\u1ea5t<\/a><\/strong><\/p>\n soi c\u1ea7u d\u00e0n 3 c\u00e0ng 2 s\u1ed1 mb v\u00edp 1 ng\u00e0y duy nh\u1ea5t<\/a><\/strong><\/p>\n soi c\u1ea7u d\u00e0n l\u00f4 10 s\u1ed1 mb v\u00edp 1 ng\u00e0y duy nh\u1ea5t<\/a><\/strong><\/p>\n soi c\u1ea7u \u0111\u1ec1 \u0111\u1ea7u \u0111u\u00f4i mb v\u00edp 1 ng\u00e0y duy nh\u1ea5t<\/a><\/strong><\/p>\n soi c\u1ea7u x\u1ec9u ch\u1ee7 mn v\u00edp 1 ng\u00e0y duy nh\u1ea5t<\/a><\/strong><\/p>\n soi c\u1ea7u gi\u1ea3i \u0111\u1eb7c bi\u1ec7t mn v\u00edp 1 ng\u00e0y duy nh\u1ea5t<\/a><\/strong><\/p>\n soi c\u1ea7u gi\u1ea3i 8 mn v\u00edp 1 ng\u00e0y duy nh\u1ea5t<\/a><\/strong><\/p>\n soi c\u1ea7u bao l\u00f4 mn v\u00edp 1 ng\u00e0y duy nh\u1ea5t<\/a><\/strong><\/p>\n soi c\u1ea7u c\u1eb7p x\u1ec9u ch\u1ee7 mn v\u00edp 1 ng\u00e0y duy nh\u1ea5t<\/a><\/strong><\/p>\n soi c\u1ea7u song th\u1ee7 l\u00f4 mn v\u00edp 1 ng\u00e0y duy nh\u1ea5t<\/a><\/strong><\/p>\n soi c\u1ea7u \u0111\u1ea7u \u0111u\u00f4i gi\u1ea3i 8 mn v\u00edp 1 ng\u00e0y duy nh\u1ea5t<\/a><\/strong><\/p>\n soi c\u1ea7u \u0111\u1ea7u \u0111u\u00f4i \u0111\u1eb7c bi\u1ec7t mn v\u00edp 1 ng\u00e0y duy nh\u1ea5t<\/a><\/strong><\/p>\n soi c\u1ea7u l\u00f4 3 s\u1ed1 mn v\u00edp 1 ng\u00e0y duy nh\u1ea5t<\/a><\/strong><\/p>\n soi c\u1ea7u x\u1ec9u ch\u1ee7 mt v\u00edp 1 ng\u00e0y duy nh\u1ea5t<\/a><\/strong><\/p>\n soi c\u1ea7u gi\u1ea3i \u0111\u1eb7c bi\u1ec7t mt v\u00edp 1 ng\u00e0y duy nh\u1ea5t<\/a><\/strong><\/p>\n soi c\u1ea7u gi\u1ea3i 8 mt v\u00edp 1 ng\u00e0y duy nh\u1ea5t<\/a><\/strong><\/p>\n soi c\u1ea7u bao l\u00f4 mt v\u00edp 1 ng\u00e0y duy nh\u1ea5t<\/a><\/strong><\/p>\n soi c\u1ea7u c\u1eb7p x\u1ec9u ch\u1ee7 mt v\u00edp 1 ng\u00e0y duy nh\u1ea5t<\/a><\/strong><\/p>\n soi c\u1ea7u song th\u1ee7 l\u00f4 mt v\u00edp 1 ng\u00e0y duy nh\u1ea5t<\/a><\/strong><\/p>\n soi c\u1ea7u \u0111\u1ea7u \u0111u\u00f4i gi\u1ea3i 8 mt v\u00edp 1 ng\u00e0y duy nh\u1ea5t<\/a><\/strong><\/p>\nKh\u00e1i ni\u1ec7m c\u01a1 b\u1ea3n \u0111\u1ec1 ch\u1eb5n l\u1ebb<\/strong><\/em><\/span><\/h2>\n
Ch\u01a1i \u0111\u1ec1 ch\u1eb5n l\u1ebb nh\u01b0 th\u1ebf n\u00e0o<\/strong><\/em><\/span><\/h2>\n
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T\u00ednh ch\u1eb5n l\u1ebb c\u01a1 b\u1ea3n<\/strong><\/span><\/h3>\n<\/li>\n<\/ol>\n
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T\u00ednh theo d\u1ea1ng t\u1ed5ng \u0111\u1ec1<\/strong><\/span><\/h3>\n<\/li>\n<\/ol>\n
C\u00e1c ph\u01b0\u01a1ng ph\u00e1p soi \u0111\u1ec1<\/strong><\/em><\/span><\/h2>\n
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Soi \u0111\u1ec1 s\u1ed1 \u0111\u1ea7u s\u1ed1 cu\u1ed1i c\u1ee7a gi\u1ea3i \u0111\u1eb7c bi\u1ec7t<\/strong><\/span><\/h3>\n<\/li>\n<\/ol>\n
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C\u00e1ch b\u1eaft \u0111\u1ec1 ch\u1eb5n l\u1ebb theo th\u1ee9 ng\u00e0y<\/strong><\/span><\/h3>\n<\/li>\n<\/ol>\n
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C\u00e1ch t\u00ednh \u0111\u1ec1 theo t\u1ed5ng khan<\/strong><\/span><\/h3>\n<\/li>\n<\/ol>\n
soi c\u1ea7u v\u00edp mi\u1ec1n b\u1eafc super vip <\/span><\/h3>\n
\n soi c\u1ea7u v\u00edp mi\u1ec1n b\u1eafc si\u00eau chu\u1ea9n<\/span><\/h3>\n
\n soi c\u1ea7u v\u00edp mi\u1ec1n nam si\u00eau chu\u1ea9n<\/span><\/h3>\n
\n soi c\u1ea7u v\u00edp mi\u1ec1n trung si\u00eau chu\u1ea9n<\/span><\/h3>\n
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