<\/span>\u0110\u1ec1 t\u1ed5ng ch\u1eb5n bao nhi\u00eau s\u1ed1?<\/h3>\n\u0110\u1ec1 t\u1ed5ng ch\u1eb5n c\u00f3 ngh\u0129a l\u00e0 c\u1ed9ng 2 s\u1ed1 cu\u1ed1i gi\u1ea3i \u0111\u1eb7c bi\u1ec7t l\u1ea1i ra 1 s\u1ed1 l\u00e0 s\u1ed1 ch\u1eb5n. T\u1ed5ng ch\u1eb5n bao g\u1ed3m 50 s\u1ed1 nh\u01b0 sau:<\/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, 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
<\/span>\u0110\u1ec1 t\u1ed5ng l\u1ebb c\u00f3 bao nhi\u00eau s\u1ed1<\/h3>\n\u0110\u1ec1 t\u1ed5ng l\u1ebb c\u00f3 ngh\u0129a l\u00e0 c\u1ed9ng 2 s\u1ed1 cu\u1ed1i gi\u1ea3i \u0111\u1eb7c bi\u1ec7t l\u1ea1i ra 1 s\u1ed1 l\u00e0 s\u1ed1 l\u1ebb. T\u1ed5ng l\u1ebb bao g\u1ed3m 50 con nh\u01b0 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, 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
<\/span>\u0110\u1ec1 t\u1ed5ng 0 c\u00f3 bao nhi\u00eau con?<\/h3>\nT\u1ed5ng 0 g\u1ed3m nh\u1eefng con g\u00ec?<\/em> T\u1ed5ng 0 c\u00f3 ngh\u0129a l\u00e0 c\u1ed9ng 2 s\u1ed1 \u0111u\u00f4i l\u1ea1i ra 1 con s\u1ed1 c\u00f3 s\u1ed1 cu\u1ed1i l\u00e0 0. T\u1ed5ng 0 bao g\u1ed3m 2 con l\u00e0 00 v\u00e0 55.<\/p>\n
<\/span>\u0110\u1ec1 t\u1ed5ng 1 c\u00f3 bao nhi\u00eau con?<\/h3>\nT\u1ed5ng 1 g\u1ed3m nh\u1eefng con g\u00ec?<\/em> T\u1ed5ng 1 c\u00f3 ngh\u0129a l\u00e0 c\u1ed9ng 2 s\u1ed1 \u0111u\u00f4i l\u1ea1i ra 1 con s\u1ed1 c\u00f3 s\u1ed1 cu\u1ed1i l\u00e0 1. T\u1ed5ng 1 bao g\u1ed3m c\u00e1c con: 01, 10, 29, 92, 38, 83, 47, 74, 56, 65.<\/p>\n
<\/span>\u0110\u1ec1 t\u1ed5ng 2 c\u00f3 bao nhi\u00eau con?<\/h3>\nT\u1ed5ng 2 g\u1ed3m nh\u1eefng con g\u00ec?<\/em> T\u1ed5ng 2 c\u00f3 ngh\u0129a l\u00e0 c\u1ed9ng 2 s\u1ed1 \u0111u\u00f4i l\u1ea1i ra 1 con s\u1ed1 c\u00f3 s\u1ed1 cu\u1ed1i l\u00e0 2. T\u1ed5ng 2 bao g\u1ed3m c\u00e1c con: 02, 20, 11, 39, 93, 48, 84, 57, 75, 66.<\/p>\n
<\/span>\u0110\u1ec1 t\u1ed5ng 3 c\u00f3 bao nhi\u00eau con?<\/h3>\nT\u1ed5ng 3 g\u1ed3m nh\u1eefng con g\u00ec?<\/em> T\u1ed5ng 3 c\u00f3 ngh\u0129a l\u00e0 c\u1ed9ng 2 s\u1ed1 \u0111u\u00f4i l\u1ea1i ra 1 con s\u1ed1 c\u00f3 s\u1ed1 cu\u1ed1i l\u00e0 3. T\u1ed5ng 3 bao g\u1ed3m c\u00e1c con: 03 30 12 21 49 94 58 85 67 76.<\/p>\n
<\/span>\u0110\u1ec1 t\u1ed5ng 4 c\u00f3 bao nhi\u00eau con?<\/h3>\nT\u1ed5ng 4 g\u1ed3m nh\u1eefng con g\u00ec?<\/em> T\u1ed5ng 4 c\u00f3 ngh\u0129a l\u00e0 c\u1ed9ng 2 s\u1ed1 \u0111u\u00f4i l\u1ea1i ra 1 con s\u1ed1 c\u00f3 s\u1ed1 cu\u1ed1i l\u00e0 4. T\u1ed5ng 4 bao g\u1ed3m c\u00e1c con: 04, 40, 13, 31, 22, 59, 95, 68, 86, 77.<\/p>\n
<\/span>\u0110\u1ec1 t\u1ed5ng 5 c\u00f3 bao nhi\u00eau con?<\/h3>\nT\u1ed5ng 5 g\u1ed3m nh\u1eefng con g\u00ec?<\/em> T\u1ed5ng 5 c\u00f3 ngh\u0129a l\u00e0 c\u1ed9ng 2 s\u1ed1 \u0111u\u00f4i l\u1ea1i ra 1 con s\u1ed1 c\u00f3 s\u1ed1 cu\u1ed1i l\u00e0 5. T\u1ed5ng 5 bao g\u1ed3m c\u00e1c con: 05, 50, 14, 41, 23, 32, 69, 96, 78, 87.<\/p>\n
<\/span>\u0110\u1ec1 t\u1ed5ng 6 c\u00f3 bao nhi\u00eau con?<\/h3>\nT\u1ed5ng 6 g\u1ed3m nh\u1eefng con g\u00ec?<\/em> T\u1ed5ng 6 c\u00f3 ngh\u0129a l\u00e0 c\u1ed9ng 2 s\u1ed1 \u0111u\u00f4i l\u1ea1i ra 1 con s\u1ed1 c\u00f3 s\u1ed1 cu\u1ed1i l\u00e0 6. T\u1ed5ng 6 bao g\u1ed3m c\u00e1c con: 06, 60, 15, 51, 24, 42, 33, 88, 79, 97.<\/p>\n
<\/span>\u0110\u1ec1 t\u1ed5ng 7 c\u00f3 bao nhi\u00eau con?<\/h3>\nT\u1ed5ng 7 g\u1ed3m nh\u1eefng con g\u00ec?<\/em> T\u1ed5ng 7 c\u00f3 ngh\u0129a l\u00e0 c\u1ed9ng 2 s\u1ed1 \u0111u\u00f4i l\u1ea1i ra 1 con s\u1ed1 c\u00f3 s\u1ed1 cu\u1ed1i l\u00e0 7. T\u1ed5ng 7 bao g\u1ed3m c\u00e1c con: 07, 70, 16, 61, 25, 52, 34, 43, 89, 98.<\/p>\n
<\/span>\u0110\u1ec1 t\u1ed5ng 8 c\u00f3 bao nhi\u00eau con?<\/h3>\nT\u1ed5ng 8 g\u1ed3m nh\u1eefng con g\u00ec?<\/em> T\u1ed5ng 8 c\u00f3 ngh\u0129a l\u00e0 c\u1ed9ng 2 s\u1ed1 \u0111u\u00f4i l\u1ea1i ra 1 con s\u1ed1 c\u00f3 s\u1ed1 cu\u1ed1i l\u00e0 8. T\u1ed5ng 8 bao g\u1ed3m c\u00e1c con: 08, 80, 17, 71, 26, 62, 35, 53, 88, 99.<\/p>\n
<\/span>\u0110\u1ec1 t\u1ed5ng 9 c\u00f3 bao nhi\u00eau con?<\/h3>\nT\u1ed5ng 9 g\u1ed3m nh\u1eefng con g\u00ec?<\/em> T\u1ed5ng 9 c\u00f3 ngh\u0129a l\u00e0 c\u1ed9ng 2 s\u1ed1 \u0111u\u00f4i l\u1ea1i ra 1 con s\u1ed1 c\u00f3 s\u1ed1 cu\u1ed1i l\u00e0 9. T\u1ed5ng 9 bao g\u1ed3m c\u00e1c con: 09, 90, 18, 81, 27, 72, 36, 63, 45, 54.<\/p>\n
Xem th\u00eam: L\u00f4 \u0111\u1ea7u \u0111u\u00f4i c\u00e2m \u0111\u00e1nh con g\u00ec?<\/strong><\/p><\/blockquote>\n
<\/span>C\u00e1ch b\u1eaft t\u1ed5ng \u0111\u1ec1 h\u00e0ng ng\u00e0y<\/h2>\nSau khi \u0111\u00e3 bi\u1ebft r\u00f5 c\u00e1ch ph\u00e2n lo\u1ea1i t\u1ed5ng \u0111\u1ec1. Anh em c\u1ea7n bi\u1ebft c\u00e1ch soi t\u1ed5ng \u0111\u1ec1 nh\u01b0 th\u1ebf n\u00e0o. T\u00f9y theo t\u1ed5ng c\u1ee7a gi\u1ea3i \u0111\u1eb7c bi\u1ec7t h\u00e0ng ng\u00e0y l\u00e0 t\u1ed5ng m\u1ea5y m\u00e0 c\u00f3 c\u00e1ch soi c\u1ea7u l\u00f4 th\u00edch h\u1ee3p cho ng\u00e0y h\u00f4m sau. Th\u00f4ng th\u01b0\u1eddng c\u00e1c tay ch\u01a1i l\u00f4 \u0111\u1ec1 l\u00e2u n\u0103m s\u1ebd \u00e1p d\u1ee5ng b\u00f3ng \u00e2m, b\u00f3ng d\u01b0\u01a1ng l\u00f4 \u0111\u1ec1 \u0111\u1ec3 t\u00ednh.<\/p>\n
\n- \u0110\u1ec1 v\u1ec1 t\u1ed5ng 0 h\u00f4m sau v\u1ec1 t\u1ed5ng m\u1ea5y? => \u0111\u00e1nh t\u1ed5ng 5<\/li>\n
- \u0110\u1ec1 v\u1ec1 t\u1ed5ng 1 h\u00f4m sau v\u1ec1 t\u1ed5ng m\u1ea5y? => \u0111\u00e1nh t\u1ed5ng 6<\/li>\n
- \u0110\u1ec1 v\u1ec1 t\u1ed5ng 2 h\u00f4m sau v\u1ec1 t\u1ed5ng m\u1ea5y? => \u0111\u00e1nh t\u1ed5ng 7<\/li>\n
- \u0110\u1ec1 v\u1ec1 t\u1ed5ng 3 h\u00f4m sau v\u1ec1 t\u1ed5ng m\u1ea5y? => \u0111\u00e1nh t\u1ed5ng 8<\/li>\n
- \u0110\u1ec1 v\u1ec1 t\u1ed5ng 4 h\u00f4m sau ra t\u1ed5ng m\u1ea5y? => \u0111\u00e1nh t\u1ed5ng 9<\/li>\n
- \u0110\u1ec1 v\u1ec1 t\u1ed5ng 5 h\u00f4m sau \u0111\u00e1nh con g\u00ec? => \u0111\u00e1nh t\u1ed5ng 1<\/li>\n
- \u0110\u1ec1 v\u1ec1 t\u1ed5ng 6 h\u00f4m sau \u0111\u00e1nh con g\u00ec? => \u0111\u00e1nh t\u1ed5ng 3<\/li>\n
- \u0110\u1ec1 v\u1ec1 t\u1ed5ng 7 h\u00f4m sau v\u1ec1 t\u1ed5ng m\u1ea5y? => \u0111\u00e1nh t\u1ed5ng 0<\/li>\n
- \u0110\u1ec1 v\u1ec1 t\u1ed5ng 8 h\u00f4m sau \u0111\u00e1nh con g\u00ec? => \u0111\u00e1nh t\u1ed5ng 5<\/li>\n
- \u0110\u1ec1 v\u1ec1 t\u1ed5ng 9 h\u00f4m sau \u0111\u00e1nh con g\u00ec? => \u0111\u00e1nh t\u1ed5ng 2<\/li>\n<\/ul>\n
![\"c\u00e1ch](\"\/wp-content\/uploads\/2024\/08\/cach-bat-tong-de-mien-bac.jpg\" "\\"cach-bat-tong-de-mien-bac\\"")
<\/p>\n
<\/span>B\u1eaft t\u1ed5ng gi\u1ea3i \u0111\u1eb7c bi\u1ec7t theo Pascal<\/h2>\nD\u00f9ng 5 s\u1ed1 gi\u1ea3i \u0111\u1eb7c bi\u1ec7t v\u00e0 5 s\u1ed1 gi\u1ea3i nh\u1ea5t gh\u00e9p l\u1ea1i v\u1edbi nhau t\u1ea1o th\u00e0nh 1 s\u1ed1. Sau \u0111\u00f3 c\u1ed9ng l\u1ea1i c\u00e1c s\u1ed1 n\u00e0y v\u1edbi nhau theo quy lu\u1eadt Pascal. C\u00f4ng ki\u1ec3u 3 s\u1ed1 li\u00ean ti\u1ebfp v\u1edbi nhau cho t\u1edbi khi ch\u1ec9 c\u00f2n 2 s\u1ed1. D\u00f9ng 2 s\u1ed1 n\u00e0y \u0111\u1ec3 nu\u00f4i l\u00f4 trong t\u1ed1i \u0111a 3 ng\u00e0y.<\/p>\n
V\u00ed d\u1ee5: ng\u00e0y 20\/1\/2024 c\u00f3 gi\u1ea3i \u0111\u1eb7c bi\u1ec7t l\u00e0 45271<\/strong> v\u00e0 gi\u1ea3i nh\u1ea5t l\u00e0 23604<\/strong>. Gh\u00e9p l\u1ea1i v\u1edbi nhau th\u00e0nh 1 con s\u1ed1 4527123604<\/strong>. C\u1ed9ng 3 s\u1ed1 li\u00ean ti\u1ebfp theo lu\u1eadt Pascal nh\u01b0 sau:<\/p>\n
4527123604<\/p>\n
979835964<\/p>\n
66718450<\/p>\n
2389295<\/p>\n
518114<\/p>\n
69925<\/p>\n
5817<\/p>\n
398<\/p>\n
27<\/p>\n
Ta d\u00f9ng con 27 \u0111\u00e1nh cho ng\u00e0y ti\u1ebfp theo. K\u1ebft qu\u1ea3 x\u1ed5 s\u1ed1 ng\u00e0y 21\/1\/2024 n\u1ed5 l\u00f4 27.<\/p>\n
<\/span>C\u00e1ch soi t\u1ed5ng \u0111\u1ec1 theo ng\u00e0y b\u00ed truy\u1ec1n<\/h2>\n![\"Nh\u1eefng](\"\/wp-content\/uploads\/2024\/07\/nhe1bbafng-con-se1bb91-may-me1baafn-c491ang-che1bb9d-c491e1bba3i-be1baa1n-300x200.png\")
<\/p>\n
Ph\u01b0\u01a1ng ph\u00e1p soi c\u1ea7u gi\u1ea3i \u0111\u1eb7c bi\u1ec7t theo t\u1ed5ng n\u00e0y c\u0169ng d\u1ef1a v\u00e0o c\u00f4ng th\u1ee9c to\u00e1n h\u1ecdc. Sau h\u00e0ng ng\u00e0n l\u1ea7n th\u1eed nghi\u1ec7m th\u00ec \u0111\u00e3 r\u00fat ra 1 c\u00f4ng th\u1ee9c b\u1eaft t\u1ed5ng \u0111\u1ec1 m\u00e0 kh\u00f4ng c\u00f3 n\u01a1i n\u00e0o c\u00f3. C\u00e1ch n\u00e0y s\u1ebd l\u1ea5y 2 gi\u1ea3i \u0111\u1eb7c bi\u1ec7t c\u1ee7a 2 ng\u00e0y li\u00ean ti\u1ebfp nhau \u0111\u1ec3 t\u00ednh. C\u00f4ng th\u1ee9c nh\u01b0 sau:<\/p>\n
![\"\u0110\u1ecba](\"\/wp-content\/uploads\/2024\/07\/c490e1bb8ba-che1bb89-soi-ce1baa7u-lc3b4-uy-tc3adn-se1babd-mang-c491e1babfn-nhie1bb81u-may-me1baafn-cho-ngc6b0e1bb9di-chc6a1i-885x525-3-300x178.png\")
<\/p>\n<\/div>\n