{"id":18220,"date":"2024-05-18T05:05:14","date_gmt":"2024-05-18T05:05:14","guid":{"rendered":"https:\/\/soicau2086.minhngocxoso.com\/dan-de-tong-chan-la-gi-dan-de-tong-le-la-gi-bo-so-lo-de\/"},"modified":"2024-05-18T05:05:14","modified_gmt":"2024-05-18T05:05:14","slug":"dan-de-tong-chan-la-gi-dan-de-tong-le-la-gi-bo-so-lo-de","status":"publish","type":"post","link":"https:\/\/soicaumienbac18h.com\/dan-de-tong-chan-la-gi-dan-de-tong-le-la-gi-bo-so-lo-de\/","title":{"rendered":"d\u00e0n \u0111\u1ec1 t\u1ed5ng ch\u1eb5n l\u00e0 g\u00ec? d\u00e0n \u0111\u1ec1 t\u1ed5ng l\u1ebb l\u00e0 g\u00ec? | b\u1ed9 s\u1ed1 l\u00f4 \u0111\u1ec1"},"content":{"rendered":"
D\u00e0n \u0111\u1ec1 t\u1ed5ng ch\u1eb5n v\u00e0 d\u00e0n \u0111\u1ec1 t\u1ed5ng l\u1ebb l\u00e0 2 b\u1ed9 s\u1ed1 \u0111\u1ec1 quen thu\u1ed9c c\u1ee7a nhi\u1ec1u b\u1ea1n ch\u01a1i l\u00f4 \u0111\u1ec1, tuy nhi\u00ean nhi\u1ec1u b\u1ea1n m\u1edbi ch\u01a1i c\u00f2n ch\u01b0a n\u1eafm r\u00f5 \u0111\u01b0\u1ee3c b\u1ed9 s\u1ed1 l\u00f4 \u0111\u1ec1 n\u00e0y. D\u00e0n \u0111\u1ec1 t\u1ed5ng ch\u1eb5n, t\u1ed5ng l\u1ebb l\u00e0 g\u00ec? Bao g\u1ed3m bao nhi\u00eau con s\u1ed1? Nh\u1eefng con n\u00e0o?.. H\u00e3y c\u00f9ng t\u00ecm hi\u1ec3u trong b\u00e0i vi\u1ebft d\u01b0\u1edbi \u0111\u00e2y: <\/span><\/p>\n D\u00e0n \u0111\u1ec1 t\u1ed5ng ch\u1eb5n g\u1ed3m nh\u1eefng s\u1ed1 c\u00f3 t\u1ed5ng 2 ch\u1eef s\u1ed1 l\u00e0 s\u1ed1 ch\u1eb5n (chia h\u1ebft cho 2). C\u00e1c b\u1ea1n c\u0169ng \u0111\u00e3 bi\u1ebft t\u1ed5ng 2 l\u00e0 s\u1ed1 ch\u1eb5n khi m\u00e0 2 s\u1ed1 c\u00f9ng l\u00e0 s\u1ed1 l\u1ebb ho\u1eb7c 2 s\u1ed1 c\u00f9ng l\u00e0 s\u1ed1 ch\u1eb5n.<\/span><\/p>\n V\u00ed d\u1ee5:<\/span><\/p>\n S\u1ed1 3 v\u00e0 s\u1ed1 7 l\u00e0 2 s\u1ed1 l\u1ebb =>> T\u1ed5ng c\u1ee7a 2 s\u1ed1 b\u1eb1ng 10 l\u00e0 s\u1ed1 ch\u1eb5n =>> T\u1ed5ng ch\u1eb5n<\/span><\/p>\n S\u1ed1 2 v\u00e0 s\u1ed1 4 l\u00e0 2 s\u1ed1 ch\u1eb5n =>> T\u1ed5ng c\u1ee7a 2 s\u1ed1 b\u1eb1ng 6 l\u00e0 s\u1ed1 ch\u1eb5n =>> T\u1ed5ng ch\u1eb5n<\/span><\/p>\n S\u1ed1 2 v\u00e0 s\u1ed1 6 l\u00e0 2 s\u1ed1 ch\u1eb5n =>> T\u1ed5ng c\u1ee7a 2 s\u1ed1 b\u1eb1ng 8 l\u00e0 s\u1ed1 ch\u1eb5n =>> T\u1ed5ng ch\u1eb5n<\/span><\/p>\n Nh\u01b0 \u0111\u00e3 gi\u1ea3i th\u00edch \u1edf ph\u1ea7n tr\u00ean. D\u00e0n \u0111\u1ec1 t\u1ed5ng ch\u1eb5n l\u00e0 b\u1ed9 s\u1ed1 c\u00f3 2 ch\u1eef s\u1ed1 l\u00e0 s\u1ed1 ch\u1eb5n ho\u1eb7c 2 s\u1ed1 l\u00e0 s\u1ed1 l\u1ebb. V\u00ec v\u1eady d\u00e0n \u0111\u1ec1 t\u1ed5ng ch\u1eb5n s\u1ebd bao g\u1ed3m nh\u1eefng s\u1ed1 c\u1ee7a 2 d\u00e0n \u0111\u1ec1 ch\u1eb5n ch\u1eb5n v\u00e0 d\u00e0n \u0111\u1ec1 l\u1ebb l\u1ebb.<\/span><\/p>\n Nh\u01b0 v\u1eady, d\u00e0n \u0111\u1ec1 t\u1ed5ng ch\u1eb5n s\u1ebd bao g\u1ed3m 50 con s\u1ed1:<\/span><\/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<\/span><\/p>\n 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<\/span><\/p>\n <\/p>\n Ph\u00eda tr\u00ean ch\u00fang ta \u0111\u00e3 n\u1eafm b\u1eaft \u0111\u01b0\u1ee3c \u201cd\u00e0n \u0111\u1ec1 t\u1ed5ng ch\u1eb5n\u201d. V\u1eady d\u00e0n \u0111\u1ec1 t\u1ed5ng l\u1ebb hi\u1ec3u \u0111\u01a1n gi\u1ea3n l\u00e0 ng\u01b0\u1ee3c l\u1ea1i v\u1edbi d\u00e0n \u0111\u1ec1 t\u1ed5ng ch\u1eb5n: D\u00e0n \u0111\u1ec1 t\u1ed5ng l\u1ebb l\u00e0 b\u1ed9 s\u1ed1 c\u00f3 t\u1ed5ng 2 ch\u1eef s\u1ed1 kh\u00f4ng chia h\u1ebft cho 2 (s\u1ed1 l\u1ebb). Trong to\u00e1n h\u1ecdc th\u00ec t\u1ed5ng c\u1ee7a 2 s\u1ed1 l\u00e0 s\u1ed1 l\u1ebb khi 2 s\u1ed1 \u0111\u00f3 l\u00e0 1 s\u1ed1 ch\u1eb5n v\u00e0 1 s\u1ed1 l\u1ebb.<\/span><\/p>\n V\u00ed d\u1ee5:<\/span><\/p>\n S\u1ed1 3 v\u00e0 s\u1ed1 4 c\u00f3 t\u1ed5ng b\u1eb1ng 7 =>> L\u00e0 s\u1ed1 l\u1ebb =>> T\u1ed5ng l\u1ebb<\/span><\/p>\n S\u1ed1 4 v\u00e0 s\u1ed1 5 c\u00f3 t\u1ed5ng b\u1eb1ng 9 =>> L\u00e0 s\u1ed1 l\u1ebb =>> T\u1ed5ng l\u1ebb<\/span><\/p>\n Nh\u01b0 v\u1eady, d\u00e0n \u0111\u1ec1 t\u1ed5ng l\u1ebb l\u00e0 b\u1ed9 s\u1ed1 \u0111\u1ec1 bao g\u1ed3n 2 d\u00e0n \u0111\u1ec1 ch\u1eb5n l\u1ebb v\u00e0 l\u1ebb ch\u1eb5n.<\/span><\/p>\n D\u00e0n \u0111\u1ec1 t\u1ed5ng l\u1ebb bao g\u1ed3m 50 b\u1ed9 s\u1ed1:<\/span><\/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<\/span><\/p>\n 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<\/span><\/p>\n Vi\u1ec7c t\u00ednh to\u00e1n, l\u1ef1a ch\u1ecdn \u0111\u00e1nh s\u1ed1 \u0111\u1ec1 theo ph\u01b0\u01a1ng ph\u00e1p d\u00e0n \u0111\u1ec1 t\u1ed5ng ch\u1eb5n, l\u1ebb c\u0169ng \u0111\u01b0\u1ee3c kh\u00e1 nhi\u1ec1u ng\u01b0\u1eddi ch\u01a1i s\u1eed d\u1ee5ng. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 m\u1ed9t s\u1ed1 \u01b0u \u0111i\u1ec3m, nh\u01b0\u1ee3c \u0111i\u1ec3m c\u1ee7a ph\u01b0\u01a1ng ph\u00e1p ch\u01a1i n\u00e0y:<\/span><\/p>\n <\/p>\n D\u1ec5 \u00e1p d\u1ee5ng \u0111\u1ec3 \u0111\u00e1nh l\u00f4 \u0111\u1ec1.<\/span><\/p>\n Ph\u00f9 h\u1ee3p v\u1edbi anh em m\u1edbi ch\u01a1i \u0111ang \u00edt kinh nghi\u1ec7m.<\/span><\/p>\n Kh\u00f4ng m\u1ea5t nhi\u1ec1u th\u1eddi gian t\u00ednh to\u00e1n.<\/span><\/p>\n K\u1ebft h\u1ee3p ph\u01b0\u01a1ng ph\u00e1p kh\u00e1c \u0111\u1ec3 t\u1ea1o ra b\u1ed9 s\u1ed1 t\u1ed5ng l\u1ebb ch\u00ednh x\u00e1c. \u0110\u00e2y l\u00e0 \u0111i\u1ec1u kh\u00f4ng ph\u1ea3i ph\u01b0\u01a1ng ph\u00e1p soi c\u1ea7u n\u00e0o c\u0169ng th\u1ef1c hi\u1ec7n \u0111\u01b0\u1ee3c.<\/span><\/p>\n T\u1ef7 l\u1ec7 tr\u00fang cao, d\u1ec5 \u0103n l\u00f4 xi\u00ean. \u0110\u00e2y c\u0169ng l\u00e0 m\u1ed9t \u01b0u \u0111i\u1ec3m khi\u1ebfn cho c\u00e1ch ch\u01a1i n\u00e0y ghi \u0111i\u1ec3m tuy\u1ec7t \u0111\u1ed1i trong m\u1eaft ng\u01b0\u1eddi \u0111\u00e1nh l\u00f4 \u0111\u1ec1.<\/span><\/p>\n Chi ph\u00ed \u0111\u1ec3 ch\u01a1i cao h\u01a1n nh\u1eefng ph\u01b0\u01a1ng ph\u00e1p kh\u00e1c<\/span><\/p>\n B\u1ed9 s\u1ed1 nhi\u1ec1u con do \u0111\u00f3 ng\u01b0\u1eddi ch\u01a1i ph\u1ea3i bi\u1ebft c\u00e1ch chia ti\u1ec1n v\u1ed1n cho m\u1ed7i con s\u1ed1 m\u1ed9t c\u00e1ch ph\u00f9 h\u1ee3p<\/span><\/p>\n Tr\u00ean \u0111\u00e2y l\u00e0 to\u00e0n b\u1ed9 kh\u00e1i ni\u1ec7m v\u1ec1 \u201cD\u00e0n \u0111\u1ec1 t\u1ed5ng ch\u1eb5n, d\u00e0n \u0111\u1ec1 t\u1ed5ng l\u1ebb\u201d v\u00e0 ph\u01b0\u01a1ng ph\u00e1p ch\u01a1i c\u1ee7a D\u00e0n \u0111\u1ec1 t\u1ed5ng ch\u1eb5n l\u1ebb. Hy v\u1ecdng anh ch\u1ecb em s\u1ebd c\u00f3 th\u00eam nhi\u1ec1u ki\u1ebfn th\u1ee9c c\u0169ng nh\u01b0 n\u1eafm ch\u1eafc h\u01a1n v\u1ec1 nh\u1eefng kinh nghi\u1ec7m ch\u01a1i l\u00f4 \u0111\u1ec1 n\u1eefa nh\u00e9. Ch\u00fac c\u00e1c b\u1ea1n th\u00e0nh c\u00f4ng!<\/span><\/p>\nD\u00e0n \u0111\u1ec1 t\u1ed5ng ch\u1eb5n<\/span><\/h2>\n
D\u00e0n \u0111\u1ec1 t\u1ed5ng ch\u1eb5n l\u00e0 g\u00ec?<\/span><\/h3>\n
D\u00e0n \u0111\u1ec1 t\u1ed5ng ch\u1eb5n bao g\u1ed3m c\u00e1c con s\u1ed1 n\u00e0o?<\/span><\/h3>\n
D\u00e0n \u0111\u1ec1 t\u1ed5ng l\u1ebb<\/span><\/h2>\n
D\u00e0n \u0111\u1ec1 t\u1ed5ng l\u1ebb l\u00e0 g\u00ec?<\/span><\/h3>\n
D\u00e0n \u0111\u1ec1 t\u1ed5ng l\u1ebb bao g\u1ed3m c\u00e1c con s\u1ed1 n\u00e0o?<\/span><\/h3>\n
C\u00f3 n\u00ean \u0111\u00e1nh \u0111\u1ec1 theo ph\u01b0\u01a1ng ph\u00e1p d\u00e0n \u0111\u1ec1 t\u1ed5ng ch\u1eb5n, t\u1ed5ng l\u1ebb?<\/span><\/h2>\n
\u01afu \u0111i\u1ec3m ph\u01b0\u01a1ng ph\u00e1p \u0111\u00e1nh d\u00e0n \u0111\u1ec1 theo t\u1ed5ng ch\u1eb5n, l\u1ebb<\/span><\/h3>\n
Nh\u01b0\u1ee3c \u0111i\u1ec3m ph\u01b0\u01a1ng ph\u00e1p \u0111\u00e1nh d\u00e0n \u0111\u1ec1 theo t\u1ed5ng ch\u1eb5n, l\u1ebb<\/span><\/h3>\n
K\u1ebft lu\u1eadn<\/span><\/h2>\n