3\/ D\u00e0n \u0111\u1ec1 50 s\u1ed1 ch\u1eb5n l\u1ebb \u0111\u00e1nh quanh n\u0103m <\/span><\/h3>\nT\u1ea1o d\u00e0n \u0111\u1ec1 s\u1ed1 ch\u1eb5n l\u1ebb \u0111\u1ec3 \u0111\u00e1nh quanh n\u0103m l\u00e0 m\u1ed9t c\u00e1ch soi c\u1ea7u kh\u00e1 \u0111\u01a1n gi\u1ea3n v\u00e0 mang l\u1ea1i c\u01a1 h\u1ed9i th\u1eafng cao. V\u1eady d\u00e0n \u0111\u1ec1 50 s\u1ed1 ch\u1eb5n l\u1ebb l\u00e0 nh\u1eefng con s\u1ed1 n\u00e0o?<\/p>\n
<\/p>\n
D\u00e0n \u0111\u1ec1 ch\u1eb5n<\/h4>\n
D\u00e0n 50 s\u1ed1 ch\u1eb5n l\u00e0 d\u00e0n \u0111\u1ec1 \u0111\u01b0\u1ee3c t\u1ea1o n\u00ean t\u1eeb nh\u1eefng con s\u1ed1 c\u00f3 \u0111u\u00f4i l\u00e0 c\u00e1c con s\u1ed1 ch\u1eb5n bao g\u1ed3m: 0, 2, 4, 6, 8<\/p>\n
B\u1ed9 d\u00e0n \u0111\u1ec1 s\u1ed1 ch\u1eb5n \u0111\u1ea7y \u0111\u1ee7 nh\u1ea5t bao g\u1ed3m: 00, 02, 04, 06, 08, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 34, 36, 38, 40, 42, 44, 46, 48, 50, 52, 54, 56, 58, 60, 62, 64, 66, 68, 70, 72, 74, 76, 78, 80, 82, 84, 86, 88, 90, 92, 94, 96, 98.<\/p>\n
D\u00e0n \u0111\u1ec1 l\u1ebb<\/h4>\n
T\u01b0\u01a1ng t\u1ef1 nh\u01b0 d\u00e0n \u0111\u1ec1 ch\u1eb5n, d\u00e0n \u0111\u1ec1 l\u1ebb \u0111\u01b0\u1ee3c t\u1ea1o n\u00ean t\u1eeb nh\u1eefng con s\u1ed1 \u0111u\u00f4i l\u00e0 nh\u1eefng con s\u1ed1 l\u1ebb l\u00e0 1, 3, 5, 7, 9.<\/p>\n
D\u00e0n \u0111\u1ec1 l\u1ebb bao g\u1ed3m c\u00e1c con s\u1ed1 c\u1ee5 th\u1ec3 nh\u01b0 sau: 01, 03, 05, 07, 09, 11, 13, 15, 17, 19, 21, 23, 25, 27, 29, 31, 33, 35, 37, 39, 41, 43, 45, 47, 49, 51, 53, 55, 57, 59, 61, 63, 65, 67, 69, 71, 73, 75, 77, 79, 81, 83, 85, 87, 89, 91, 93, 95, 97, 99.<\/p>\n
C\u00e1ch \u0111\u00e1nh theo d\u00e0n \u0111\u1ec1 50 s\u1ed1 ch\u1eb5n l\u1ebb nh\u01b0 sau: Anh em t\u00ednh t\u1ed5ng gi\u1ea3i \u0111\u1eb7c bi\u1ec7t m\u1ed7i ch\u1ee7 nh\u1eadt h\u00e0ng tu\u1ea7n. N\u1ebfu nh\u01b0 th\u1ea5y t\u1ed5ng ch\u1eb5n th\u00ec l\u1ef1a ch\u1ecdn d\u00e0n \u0111\u1ec1 ch\u1eb5n \u0111\u00e1nh h\u1ebft tu\u1ea7n.<\/p>\n
V\u00e0 ng\u01b0\u1ee3c l\u1ea1i c\u00e1ch \u0111\u00e1nh d\u00e0n \u0111\u1ec1 l\u1ebb c\u0169ng t\u01b0\u01a1ng t\u1ef1 nh\u01b0 v\u1edbi c\u00e1ch \u0111\u00e1nh d\u00e0n \u0111\u1ec1 ch\u1eb5n. N\u1ebfu nh\u01b0 th\u1ea5y t\u1ed5ng c\u1ee7a gi\u1ea3i \u0111\u1eb7c bi\u1ec7t ng\u00e0y ch\u1ee7 nh\u1eadt l\u00e0 m\u1ed9t con s\u1ed1 l\u1ebb. Th\u00ec anh em l\u1ef1a ch\u1ecdn d\u00e0n \u0111\u1ec1 t\u1ed5ng l\u1ebb \u0111\u00e1nh cho t\u1edbi h\u1ebft tu\u1ea7n.<\/p>\n
B\u1eadt m\u00ed d\u00e0n \u0111\u1ec1 50 s\u1ed1 h\u00f4m nay<\/span><\/h2>\n\u0110\u1ec3 bi\u1ebft d\u00e0n \u0111\u1ec1 50 s\u1ed1 h\u00f4m nay l\u00e0 bao nhi\u00eau m\u1eddi b\u1ea1n xem k\u1ebft qu\u1ea3 x\u1ed5 s\u1ed1 ng\u00e0y h\u00f4m qua t\u1ee9c ng\u00e0y 14\/12\/2024 b\u00ean d\u01b0\u1edbi \u0111\u00e2y:<\/p>\n
Nh\u01b0 v\u1eady theo nh\u01b0 k\u1ebft qu\u1ea3 x\u1ed5 s\u1ed1 MB th\u00ec gi\u1ea3i \u0111\u1eb7c bi\u1ec7t l\u00e0 45776 ta c\u00f3 t\u1ed5ng \u0111\u1ec1 l\u00e0 7 + 6 = 13 l\u1edbn h\u01a1n 10<\/p>\n
V\u1eady ta s\u1ebd c\u00f3 d\u00e0n \u0111\u1ec1 36 s\u1ed1 bao g\u1ed3m:<\/p>\n
19, 28, 29, 37, 38, 39, 46, 47, 48, 49, 55, 56, 57, 58, 59, 64, 65, 66, 67, 68, 69, 73, 74, 75, 76, 77, 78, 79, 82, 83, 84, 85, 86, 87, 88, 89, 91, 92, 93, 94, 95, 96, 97, 98, 99.<\/p>\n
C\u1ed9ng v\u1edbi 14 s\u1ed1 t\u00ecm \u0111\u01b0\u1ee3c d\u1ef1a theo \u0111\u1ea7u \u0111u\u00f4i hay v\u1ec1 ph\u00eda b\u00ean tr\u00ean t\u00ecm \u0111\u01b0\u1ee3c. Suy ra ta s\u1ebd c\u00f3 d\u00e0n \u0111\u1ec1 50 s\u1ed1 h\u00f4m nay s\u1ebd l\u00e0:<\/p>\n
11, 13, 15, 19, 41, 43, 45, 49, 61, 63, 65, 69, 71, 73, 19, 28, 29, 37, 38, 39, 46, 47, 48, 49, 55, 56, 57, 58, 59, 64, 65, 66, 67, 68, 69, 73, 74, 75, 76, 77, 78, 79, 82, 83, 84, 85, 86, 87, 88, 89, 91, 92, 93, 94, 95, 96, 97, 98, 99.<\/p>\n