{"id":18093,"date":"2024-05-03T04:17:19","date_gmt":"2024-05-03T04:17:19","guid":{"rendered":"https:\/\/soicau4018.minhngocxoso.com\/?p=18093"},"modified":"2024-05-03T04:17:19","modified_gmt":"2024-05-03T04:17:19","slug":"dan-de-dac-biet-dan-49-quan-mien-bac","status":"publish","type":"post","link":"https:\/\/xsmbmienphi.com\/dan-de-dac-biet-dan-49-quan-mien-bac\/","title":{"rendered":"d\u00e0n \u0111\u1ec1 \u0111\u1eb7c bi\u1ec7t \u2013 d\u00e0n 49 qu\u00e2n mi\u1ec1n b\u1eafc"},"content":{"rendered":"
<\/p>\n\n\n
Nh\u00ecn chung, c\u00e1c lo\u1ea1i d\u00e0n \u0111\u1ec1 \u0111\u1eb7c bi\u1ec7t \u0111\u00e3 c\u00f3 t\u1eeb l\u00e2u v\u1edbi m\u1ee5c \u0111\u00edch l\u00e0 l\u00e0m t\u0103ng kh\u1ea3 n\u0103ng chi\u1ebfn th\u1eafng c\u1ee7a ng\u01b0\u1eddi ch\u01a1i. C\u00e1c lo\u1ea1i d\u00e0n \u0111\u1ec1 n\u00e0y kh\u00e1 hay, bao g\u1ed3m d\u00e0n 49 qu\u00e2n mi\u1ec1n b\u1eafc, d\u00e0n \u0111\u1ec1 20 s\u1ed1, 30 s\u1ed1 v\u1edbi c\u00e1c khung th\u1eddi gian 30 ng\u00e0y, 40 ng\u00e0y,\u2026 Ch\u00fang l\u00e0 nh\u1eefng d\u00e0n \u0111\u1ec1 \u0111\u1eb7c bi\u1ec7t \u0111\u1ec3 ng\u01b0\u1eddi ch\u01a1i xem theo c\u00e1ch \u0111\u00e1nh.<\/p>\n\n\n\n
Do \u0111\u00f3, h\u00f4m nay th\u00ec c\u00e1c b\u1ea1n h\u00e3y c\u00f9ng v\u1edbi th\u1ee7 thu\u1eadt nh\u00e0 c\u00e1i t\u00ecm hi\u1ec3u v\u1ec1 c\u00e1c lo\u1ea1i d\u00e0n \u0111\u1ec1 n\u00e0y nh\u00e9.<\/p>\n\n\n\n
D\u00e0n \u0111\u1ec1 30 s\u1ed1 b\u1ea5t b\u1ea1i khung 3 ng\u00e0y c\u0169ng nh\u01b0 c\u00e1ch l\u1eadp d\u00e0n \u0111\u1ec1 30s \u0111\u00e1nh trong khung 3 ng\u00e0y c\u0169ng gi\u1ed1ng v\u1edbi c\u00e1ch l\u1eadp d\u00e0n 20s v\u00e0 d\u00e0n 36s. Hi\u1ec7u qu\u1ea3 c\u1ee7a bi\u1ebfn th\u1ec3 n\u00e0y c\u00f3 th\u1ec3 n\u00f3i l\u00e0 su\u00fdt so\u00e1t v\u1edbi 2 d\u00e0n anh ch\u1ecb c\u1ee7a n\u00f3 tr\u01b0\u1edbc \u0111\u00f3.<\/p>\n\n\n\n
Anh em ti\u1ebfn h\u00e0nh ch\u1ecdn ra 6 s\u1ed1 \u0111\u1ea7u v\u00e0 5 s\u1ed1 \u0111u\u00f4i v\u1ec1 nhi\u1ec1u nh\u1ea5t g\u1ea7n \u0111\u00e2y. Sau \u0111\u00f3 ti\u1ebfn h\u00e0nh gh\u00e9p ch\u00fang l\u1ea1i v\u1edbi nhau \u0111\u1ec1 t\u1ea1o d\u00e0n \u0111\u1ec1 30s. C\u00e1ch th\u1ee9c gh\u00e9p xin m\u1eddi l\u01b0\u1edbt l\u1ea1i c\u00e1ch t\u1ea1o d\u00e0n \u0111\u1ec1 20s v\u00e0 36s \u1edf tr\u00ean.<\/p>\n\n\n\n
D\u00e0n 34 s\u1ed1 mi\u1ec1n B\u1eafc hay ra nh\u1ea5t l\u00e0 d\u00e0n \u0111\u1ec1 c\u00f3 d\u1ea1ng chia h\u1ebft cho 3. D\u00e0n \u0111\u1ec1 n\u00e0y anh em c\u00f3 th\u1ec3 xem chi ti\u1ebft c\u00e1ch t\u00ednh trong v\u00e0i vi\u1ebft v\u1ec1 T\u1ed5ng \u0111\u1ec1.<\/p>\n\n\n\n
D\u00e0n 34 s\u1ed1 mi\u1ec1n B\u1eafc c\u00f3: 00, 03, 06, 09, 12, 15, 18, 21, 24, 27, 30, 33, 36, 39, 42, 45, 48, 51, 54, 57, 60, 63, 66, 69, 72, 75, 78, 81, 84, 87, 90, 93, 96, 99.<\/p>\n\n\n\n
D\u00e0n \u0111\u1ec1 36s kh\u00e1 l\u00e0 \u0111\u01b0\u1ee3c l\u00f2ng anh em ch\u01a1i \u0111\u1ec1. Ch\u1ec9 c\u1ea7n l\u01b0\u1edbt m\u1ed9t v\u00f2ng tr\u00ean m\u1ea1ng nh\u1eefng nh\u00e0 t\u1ea1o d\u00e0n chuy\u00ean nghi\u1ec7p th\u00ec c\u00f3 th\u1ec3 th\u1ea5y \u0111\u01b0\u1ee3c r\u1ea5t nhi\u1ec1u k\u00eanh soi c\u1ea7u ch\u1ecdn soi d\u00e0n n\u00e0y. \u0110\u01a1n c\u1eed nh\u01b0 k\u00eanh D\u00e0n \u0111\u1ec1 Ph\u1ea1m Tu\u1ea5n. C\u00e1c b\u00e1c ch\u1eafc c\u0169ng hay v\u00e0o coi, nh\u01b0ng h\u1eb3n l\u00e0 kh\u00f4ng bi\u1ebft l\u00e0m th\u1ebf n\u00e0o ng\u01b0\u1eddi ta c\u00f3 c\u00e1c d\u00e0n \u0111\u1ec1 hay nh\u01b0 v\u1eady.<\/p>\n\n\n\n
\u0110\u1ec3 t\u1ea1o d\u00e0n \u0111\u1ec1 36 s\u1ed1 chu\u1ea9n-ch\u1ea5t-R\u1ed3ng B\u1ea1ch Kim th\u00ec ch\u00fang ta c\u00f3 kh\u00e1 l\u00e0 nhi\u1ec1u ph\u01b0\u01a1ng ph\u00e1p. D\u01b0\u1edbi \u0111\u00e2y xin \u0111\u01b0\u1ee3c g\u1eedi t\u1edbi anh em 3 ph\u01b0\u01a1ng ph\u00e1p ch\u00ednh, k\u00e8m ch\u00fa gi\u1ea3i v\u00e0 v\u00ed d\u1ee5 \u0111\u1ec3 anh em d\u1ec5 h\u00ecnh dung h\u01a1n.<\/p>\n\n\n\n
Ph\u01b0\u01a1ng ph\u00e1p n\u00e0y gi\u1ed1ng v\u1edbi ph\u01b0\u01a1ng ph\u00e1p soi d\u00e0n \u0111\u1ec1 20s nh\u01b0ng c\u00f3 bi\u1ebfn t\u1ea5u thay \u0111\u1ed5i. Thay v\u00ec gh\u00e9p 5 s\u1ed1 \u0111\u1ea7u v\u1edbi 4 s\u1ed1 \u0111u\u00f4i ch\u00fang ta s\u1ebd gh\u00e9p 6 s\u1ed1 \u0111\u1ea7u v\u1edbi 6 s\u1ed1 \u0111u\u00f4i. \u0110\u1ec3 d\u1ec5 nh\u1edb th\u00ec anh em c\u00f3 th\u1ec3 nh\u1ea9m t\u00ednh 5\u00d74=20 s\u1ed1; 6\u00d76= 36 s\u1ed1.<\/p>\n\n\n\n
V\u00ed d\u1ee5 c\u1ee5 th\u1ec3: 30 ng\u00e0y th\u1ed1ng k\u00ea \u0111\u1ea7u \u0111u\u00f4i t\u00ednh t\u1edbi ng\u00e0y 28\/06\/2024 ch\u00fang ta c\u00f3:<\/p>\n\n\n\n
V\u1edbi ph\u01b0\u01a1ng ph\u00e1p n\u00e0y, anh em ch\u00fang ta t\u00ednh theo t\u1ed5ng 2 ch\u1eef s\u1ed1 con \u0111\u1ec1 g\u1ea7n nh\u1ea5t v\u00e0 so s\u00e1nh v\u1edbi 10 \u0111\u1ec3 l\u1ea5y d\u00e0n. T\u1ee9c l\u00e0:<\/p>\n\n\n\n
V\u00ed d\u1ee5: k\u1ebft qu\u1ea3 XSMB ng\u00e0y 27\/06\/2024, gi\u1ea3i \u0111\u1eb7c bi\u1ec7t v\u1ec1 51776. T\u1ed5ng \u0111\u1ec1 7+6= 5. V\u1eady anh em c\u00f3 th\u1ec3 l\u1ea5y d\u00e0n \u0111\u1ec1 b\u00e9 h\u01a1n 10 \u1edf tr\u00ean \u0111\u1ec3 \u0111\u00e1nh.<\/p>\n\n\n\n Theo c\u00f4ng th\u1ee9c tr\u00ean, anh em c\u00f3 th\u1ec3 thay s\u1ed1 v\u00e0o x \u0111\u1ec3 t\u1ea1o ra d\u00e0n m\u1edbi.V\u00ed d\u1ee5 v\u1edbi x l\u00e0 0, ta c\u00f3 d\u00e0n 0 \u2013 (0+5). V\u1eady ta c\u00f3 d\u00e0n \u0111\u1ec1 0-5.<\/p>\n\n\n\n T\u01b0\u01a1ng t\u1ef1 ch\u00fang ta s\u1ebd c\u00f3 c\u00e1c b\u1ed9 d\u00e0n l\u00f4 \u0111\u1ec1 theo c\u00f4ng th\u1ee9c tr\u00ean nh\u01b0 sau:<\/p>\n\n\n\n D\u1ef1a v\u00e0o b\u1ea3ng tr\u00ean, anh em c\u00f3 th\u1ec3 nh\u1eadn ra c\u00e1c d\u00e0n \u0111\u1ec1 mi\u1ec1n B\u1eafc n\u00e0y \u0111\u1ec1u c\u00f3 chung m\u1ed9t t\u00ednh ch\u1ea5t. V\u00ed d\u1ee5, v\u1edbi d\u00e0n 0-5, anh em li\u1ec7t k\u00ea m\u1ed9t d\u00e0n s\u1ed1 \u0111\u01b0\u1ee3c gh\u00e9p l\u1ea1i t\u1eeb c\u00e1c ch\u1eef s\u1ed1 t\u1eeb 0 \u0111\u1ebfn 5 (0 1 2 3 4 5).<\/p>\n\n\n\n C\u00e1c d\u00e0n \u0111\u1ec1 36s c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng nu\u00f4i khung 3 ng\u00e0y ho\u1eb7c khung 5 ng\u00e0y. \u0110\u1ec3 bi\u1ebft chi ti\u1ebft c\u00e1ch nu\u00f4i d\u00e0n \u0111\u1ec1 khung 3-5 ng\u00e0y nh\u01b0 th\u1ebf n\u00e0o, anh em vui l\u00f2ng truy c\u1eadp b\u00e0i vi\u1ebft v\u1ec1 L\u00f4 khung.<\/p>\n\n\n\n D\u00e0n \u0111\u1ec1 3 \u2013 8 con s\u1ed1 trong l\u00f4 \u0111\u1ec1 nu\u00f4i theo tu\u1ea7n, c\u00e1ch b\u1eaft d\u00e0n \u0111\u1ec1 3-8 s\u1ed1 l\u00e0 d\u00e0n th\u1ed1ng k\u00ea c\u00e1c con s\u1ed1 t\u1eeb \u0111\u1ea7u 3 \u0111\u00edt 3 cho t\u1edbi \u0111\u1ea7u 8 \u0111\u00edt 8. C\u1ee5 th\u1ec3 nh\u01b0 sau \u0111\u00e2y:<\/p>\n\n\n\n 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 56 55 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88.<\/p>\n\n\n\n T\u1ed5ng c\u1ea3 th\u1ea3y c\u00f3 55 con s\u1ed1. Anh \u1eb9m c\u00f3 th\u1ec3 ch\u1ecdn nu\u00f4i min 1 tu\u1ea7n ho\u1eb7c max 10 ng\u00e0y.<\/p>\n\n\n\n D\u00e0n \u0111\u1ec1 40 con s\u1ed1 \u0111\u01b0\u1ee3c t\u1ea1o b\u1edfi 2 ch\u1eef s\u1ed1 cu\u1ed1i Gi\u1ea3i 2.2 v\u1ec1 ng\u00e0y h\u00f4m tr\u01b0\u1edbc. \u0110\u1ec3 ch\u1ecdn s\u1ed1, anh em \u00e1p d\u1ee5ng ph\u01b0\u01a1ng ph\u00e1p gh\u00e9p ch\u1ea1m d\u00e0n \u0111\u1ec1. C\u1ee5 th\u1ec3 l\u00e0 l\u1ea5y b\u1ed9 d\u00e0n \u0111\u1ea7u ch\u1ea1m v\u00e0 \u0111\u00edt ch\u1ea1m c\u1ee7a 2 ch\u1eef s\u1ed1 cu\u1ed1i \u0111\u00f3, th\u00eam b\u00f3ng v\u00e0 b\u00f3ng l\u1ed9n c\u1ee7a b\u1ed9 96.<\/p>\n\n\n\n V\u00ed d\u1ee5: ng\u00e0y 4\/7\/2024 gi\u1ea3i 2.2 v\u1ec1 l\u00f4 96. C\u00e1c b\u00e1c ti\u1ebfn h\u00e0nh t\u1ea1o d\u00e0n \u0111\u1ec1 40s g\u1ed3m c\u00e1c con s\u1ed1 c\u00f3 \u0111\u1ea7u \u0111\u00edt ch\u1ea1m 9 v\u00e0 ch\u1ea1m 6, c\u1ed9ng th\u00eam con b\u00f3ng v\u00e0 b\u00f3ng l\u1ed9n c\u1ee7a ch\u00fang: Th\u01b0\u1eddng \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 D\u00e0n \u0111\u1ec1 49 qu\u00e2n mi\u1ec1n B\u1eafc<\/strong> v\u00ec \u0111\u01b0\u1ee3c ng\u01b0\u1eddi mi\u1ec1n B\u1eafc h\u1ecd \u00e1p d\u1ee5ng kh\u00e1 nhi\u1ec1u. D\u00e0n 49 qu\u00e2n c\u00f3 th\u1ec3 ch\u01a1i theo c\u1ea3 ki\u1ec3u l\u00e0 ch\u01a1i bao l\u00f4 ho\u1eb7c ch\u01a1i \u0111\u1ec1, tuy nhi\u00ean l\u00fd gi\u1ea3i v\u00ec sao ng\u01b0\u1eddi ta th\u01b0\u1eddng hay g\u1ecdi l\u00e0 D\u00e0n \u0111\u1ec1 49 qu\u00e2n thay v\u00ec D\u00e0n l\u00f4 49 qu\u00e2n th\u00ec m\u00ecnh xin gi\u1ea3i th\u00edch sau. <\/p>\n\n\n\n N\u1ebfu \u0111\u00e1nh l\u00f4 d\u00e0n \u0111\u1eb7c bi\u1ec7t (\u0110B) 49 s\u1ed1 (49 con) th\u00ec kh\u00e1 l\u00e0 n\u1eb7ng v\u1ed1n v\u00ec b\u1ea1n ph\u1ea3i mua bao l\u00f4 t\u1eadn 49 con. N\u1ebfu \u0111\u00e1nh m\u1ed7i con l\u00f4 1 \u0111i\u1ec3m th\u00ec ti\u1ec1n v\u1ed1n bao l\u00f4 d\u00e0n 49 con l\u00e0 49\u00d723=1127k! Ch\u1ec9 1 \u0111i\u1ec3m th\u00f4i m\u00e0 ti\u1ec1n v\u1ed1n c\u0169ng \u0111\u00e3 l\u00ean t\u1edbi tr\u00ean 1 tri\u1ec7u r\u1ed3i. Nghe c\u00f3 v\u1ebb o\u1ea3i qua, kh\u00f4ng bi\u1ebft tr\u00fang nhi\u00eau m\u00e0 ch\u01b0a g\u00ec m\u1ea5t h\u01a1n 1tr th\u1ebf n\u00ean m\u1edbi c\u00f3 ph\u01b0\u01a1ng ph\u00e1p k\u1ebf.<\/p>\n\n\n\n Ch\u00ednh v\u00ec l\u00fd do tr\u00ean m\u00e0 d\u00e0n l\u00f4 \u0111\u1ec1 49 qu\u00e2n \/ s\u1ed1<\/strong> XSMB ch\u1ec9 ph\u00f9 h\u1ee3p \u0111\u00e1nh \u0111\u1ec1 thay v\u00ec \u0111\u00e1nh D\u00e0n l\u00f4 49 con th\u00ec s\u1ebd r\u1ea5t n\u1eb7ng. V\u1ed1n s\u1ebd \u00edt h\u01a1n, ch\u1ec9 49k cho 49 con. Nh\u01b0ng \u0111\u1ed5i l\u1ea1i th\u00ec ti\u1ec1n l\u1eddi \u0111\u01b0\u1ee3c c\u00f3 th\u1ec3 s\u1ebd kh\u00f4ng nhi\u1ec1u nh\u01b0 tr\u00fang l\u00f4 d\u00e0n 49 s\u1ed1 tuy nhi\u00ean ch\u1eafc ch\u1eafc \u0111i k\u00e8m \u0111\u00f3 l\u00e0 r\u1ee7i ro c\u0169ng s\u1ebd kh\u00f4ng cao nh\u01b0 ch\u01a1i D\u00e0n l\u00f4 49 s\u1ed1 (49s).<\/p>\n\n\n\n D\u00e0n 49 bao nhi\u00eau con?<\/strong> D\u00e0n 49 qu\u00e2n th\u00ec ch\u1eafc ch\u1eafn s\u1ebd bao g\u1ed3m 49 con, trong \u0111\u00f3 bao g\u1ed3m: 02, 04, 05, 06, 07, 09, 12, 11, 14, 15, 16, 17, 18, 19, 23, 24, 25, 26, 27, 28, 29, 31, 35, 36, 38, 39, 48, 51, 53, 54, 56, 58, 59, 60, 64, 65, 67, 68, 69, 71, 75, 76, 78, 79, 81, 83, 85, 86, 95.<\/p>\n\n\n\n N\u1ebfu chia d\u00e0n 50s d\u1ef1a v\u00e0o s\u1ed1 ch\u1eb5n l\u1ebb, ch\u00fang ta c\u00f3 th\u1ec3 chia n\u00f3 theo d\u00e0n \u0111\u1ea7u ch\u1eb5n ho\u1eb7c \u0111\u1ea7u l\u1ebb nh\u01b0 d\u01b0\u1edbi \u0111\u00e2y:<\/p>\n\n\n\n T\u1ef1 t\u1ea1o l\u1eadp d\u00e0n \u0111\u1ec1 50 s\u1ed1 m\u1ed9t c\u00e1ch si\u00eau chu\u1ea9n. C\u00e1c b\u00e1c c\u00f3 th\u1ec3 ch\u1ecdn l\u1ea5y m\u1ed9t d\u00e0n \u0111\u1ec1 50s t\u1eeb 00 \u0111\u1ebfn 49 ho\u1eb7c t\u1eeb 50 \u0111\u1ebfn 99, ho\u1eb7c \u0111\u1ea1i lo\u1ea1i nh\u01b0 th\u1ebf. Nh\u01b0ng c\u00e1ch t\u1ed1t nh\u1ea5t v\u1eabn l\u00e0 th\u1ed1ng k\u00ea \u0111\u1ea7u \u0111u\u00f4i c\u00e1c con \u0111\u1ec1 v\u1ec1 g\u1ea7n \u0111\u00e2y.<\/p>\n\n\n\n D\u00e0n \u0111\u1ec1 56 s\u1ed1 b\u1ea5t t\u1eed \u0111\u01b0\u1ee3c t\u1ea1o n\u00ean b\u1eb1ng c\u00e1ch lo\u1ea1i b\u1ecf nh\u1eefng b\u1ed9 s\u1ed1 ch\u1ea1m 0, ch\u1ea1m 1 v\u00e0 b\u1ed9 s\u1ed1 k\u00e9p b\u1eb1ng (11 22 33,\u2026).<\/p>\n\n\n\n Khi \u0111\u00f3 d\u00e0n \u0111\u1ec1 56 con s\u1ebd c\u00f2n l\u1ea1i: 23, 24, 25, 26, 27, 28, 29, 32, 34, 35, 36, 37, 38, 39, 42, 43, 45, 46, 47, 48, 49, 52, 53, 54, 56, 57, 58, 59, 62, 63, 64, 65, 67, 68, 69, 72, 73, 74, 75, 76, 78, 79, 82, 83, 84, 85, 86, 87, 89, 92, 93, 94, 95, 96, 97, 98.<\/p>\n\n\n\n Soi c\u1ea7u d\u00e0n \u0111\u1eb7c bi\u1ec7t l\u00e0 1 trong nh\u1eefng c\u00e1ch \u0111\u00e1nh d\u00e0n l\u00f4 d\u00e0n \u0111\u1ec1 ph\u1ed5 th\u00f4ng nh\u1ea5t hi\u1ec7n nay. Ch\u00fang ta c\u00f3 th\u1ec3 nu\u00f4i b\u1ed9 d\u00e0n \u0111\u1eb7c bi\u1ec7t nh\u01b0 sau:<\/p>\n\n\n\n D\u00f9 ch\u01b0a th\u1ea1o ch\u01a1i \u0111\u1ec1 th\u00ec anh em nghe t\u1eeb d\u00e0n \u0111\u1ec1 k\u00e9p hay d\u00e0n \u0111\u1ec1 k\u00e9p b\u1eb1ng th\u00ec c\u0169ng hi\u1ec3u \u0111\u01b0\u1ee3c ch\u00fang g\u1ed3m nh\u1eefng con n\u00e0o. Tuy nhi\u00ean n\u1ebfu m\u00e0 n\u00f3i \u0111\u1ebfn nh\u1eefng d\u00e0n \u0111\u1ec1 k\u00e9p kh\u00e1c th\u00ec ch\u1eafc m\u1ecdi ng\u01b0\u1eddi c\u00f2n ch\u01b0a th\u00f4ng hi\u1ec3u.<\/p>\n\n\n\n D\u00e0n \u0111\u1ec1 k\u00e9p \u00e2m g\u1ed3m c\u00f3 nh\u1eefng con s\u1ed1 n\u00e0o? \u00c1p d\u1ee5ng quy t\u1eafc b\u00f3ng \u00e2m \u0111\u1ed1i v\u1edbi c\u00e1c s\u1ed1 \u0111\u1ec1, ch\u00fang ta c\u00f3 th\u1ec3 t\u1ea1o \u0111\u01b0\u1ee3c b\u1ed9 s\u1ed1 k\u00e9p \u00e2m. D\u00e0n n\u00e0y g\u1ed3m c\u00f3 10 con s\u1ed1 nh\u01b0 sau:<\/p>\n\n\n\n 07, 70, 14, 41, 29, 92, 36, 63, 58, 85<\/p>\n\n\n\n D\u00e0n \u0111\u1ec1 k\u00e9p l\u1ec7ch c\u00f3 bao nhi\u00eau con? D\u00e0n \u0111\u1ec1 k\u00e9p l\u1ec7ch c\u00f2n c\u00f3 t\u00ean l\u00e0 d\u00e0n \u0111\u1ec1 s\u00e1t k\u00e9p. Ch\u00fang l\u00e0 nh\u1eefng con s\u1ed1 \u0111\u01b0\u1ee3c t\u1ea1o n\u00ean b\u1edfi quy t\u1eafc b\u00f3ng d\u01b0\u01a1ng. Ch\u00fang ta c\u00f3 d\u00e0n k\u00e9p l\u1ec7ch g\u1ed3m c\u00f3 10 s\u1ed1 nh\u01b0 sau:<\/p>\n\n\n\n 05, 50, 16, 61, 27, 72, 38, 83, 49, 94<\/p>\n\n\n\n Ch\u00fang ta c\u00f3 2 lo\u1ea1i d\u00e0n \u0111\u1ec1 s\u00e1t k\u00e9p (c\u00f2n c\u00f3 t\u00ean l\u00e0 d\u00e0n \u0111\u1ec1 \u00e1p k\u00e9p).<\/p>\n\n\n\n C\u00e1c s\u1ed1 ch\u1eb5n v\u00e0 l\u1ebb khi k\u1ebft h\u1ee3p s\u1ebd t\u1ea1o ra \u0111\u01b0\u1ee3c c\u00e1c b\u1ed9 s\u1ed1 c\u00f3 t\u00ednh ch\u1ea5t nh\u01b0 d\u01b0\u1edbi \u0111\u00e2y<\/p>\n\n\n\n D\u00e0n n\u00e0y \u0111\u01b0\u1ee3c t\u1ea1o b\u1edfi s\u1ed1 \u0111\u1ea7u l\u00e0 s\u1ed1 ch\u1eb5n c\u00f2n s\u1ed1 \u0111u\u00f4i l\u00e0 s\u1ed1 l\u1ebb. G\u1ed3m c\u00f3 25 con s\u1ed1 nh\u01b0 sau:<\/p>\n\n\n\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<\/p>\n\n\n\n G\u1ed3m c\u00f3 25 s\u1ed1 c\u00f3 h\u00e0ng ch\u1ee5c l\u00e0 s\u1ed1 l\u1ebb c\u00f2n h\u00e0ng \u0111\u01a1n v\u1ecb s\u1ed1 ch\u1eb5n.<\/p>\n\n\n\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<\/p>\n\n\n\n H\u00e0ng \u0111\u01a1n v\u1ecb v\u00e0 h\u00e0ng ch\u1ee5c \u0111\u1ec1u l\u00e0 c\u00e1c s\u1ed1 ch\u1eb5n. G\u1ed3m c\u00f3 25 s\u1ed1:<\/p>\n\n\n\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<\/p>\n\n\n\n L\u00e0 b\u1ed9 25 \u0111\u01b0\u1ee3c t\u1ea1o b\u1edfi c\u00e1c con s\u1ed1 l\u1ebb.<\/p>\n\n\n\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<\/p>\n\n\n\n B\u1ed9 s\u1ed1 n\u00e0y g\u1ed3m c\u00f3 20 con. N\u00f3 c\u00f3 t\u00ean g\u1ecdi nh\u01b0 v\u1eady b\u1edfi ch\u00fang ta s\u1ebd l\u1ef1a ch\u1ecdn nu\u00f4i b\u1ed9 n\u00e0y trong kho\u1ea3ng gi\u1eefa th\u00e1ng. Th\u01b0\u1eddng d\u00e0n \u0111\u1ec1 trung gian n\u1ed5 v\u00e0o ng\u00e0y 9 ho\u1eb7c 13, 14. Ch\u00fang ta c\u00f3 20 con s\u1ed1 b\u1ed9 s\u1ed1 trung gian nh\u01b0 sau:<\/p>\n\n\n\n 060, 070, 080 090, 171, 181, 191, 282, 292, 393<\/p>\n\n\n\n Ngo\u00e0i nh\u1eefng d\u00e0n \u0111\u1eb7c bi\u1ec7t tr\u00ean, ch\u00fang ta c\u00f2n c\u00f3 r\u1ea5t nhi\u1ec1u d\u00e0n \u0111\u1ec1 c\u00f3 th\u1ec3 \u0111\u00e1nh theo kh\u00e1c n\u1eefa. Ch\u00fang l\u00e0 nh\u1eefng d\u00e0n \u0111\u1ec1 c\u1ed1 \u0111\u1ecbnh d\u1ef1a theo m\u1ed9t t\u00ednh ch\u1ea5t nh\u1ea5t \u0111\u1ecbnh. V\u00ed d\u1ee5 nh\u01b0:<\/p>\n\n\n\n D\u1ef1a theo t\u00ednh ch\u1ea5t c\u00e1c s\u1ed1 chia cho 3, ch\u00fang ta c\u00f3 c\u00e1c d\u1ea1ng d\u00e0n \u0111\u1ec1 chia cho 3 \u0111\u00f3 l\u00e0:<\/p>\n\n\n\n \u0110\u1ec3 t\u00ecm hi\u1ec3u v\u1ec1 d\u00e0n \u0111\u1ec1 n\u00e0y, anh c\u00f3 th\u1ec3 tham kh\u1ea3o trong b\u00e0i vi\u1ebft v\u1ec1 T\u1ed5ng \u0111\u1ec1 \u2013 c\u00e1c b\u1ed9 s\u1ed1 \u0111\u1ec1<\/p>\n\n\n\n D\u1ef1a theo b\u1ea3ng t\u1ed5ng h\u1ee3p c\u00e1c con l\u00f4 gan, \u0111\u1ec1 gan, anh em c\u00f3 th\u1ec3 l\u1eadp cho m\u00ecnh m\u1ed9t d\u00e0n \u0111\u1ec1 l\u00e2u v\u1ec1 \u01b0ng \u00fd. Th\u01b0\u1eddng th\u00ec ng\u01b0\u1eddi ta l\u1eadp d\u00e0n \u0111\u1ec1 gan \u0111\u1ec3 tr\u00e1nh ch\u00fang ho\u1eb7c \u0111\u1ec3 quan s\u00e1t d\u1ea5u hi\u1ec7u ch\u00fang s\u1eafp v\u1ec1. Ch\u1ee9 c\u00f2n n\u00f3i \u0111\u1ec3 \u0111\u00e1nh th\u00ec anh em ch\u1ec9 n\u00ean l\u1eadp d\u00e0n l\u00f4 l\u00e2u v\u1ec1 \u0111\u1ec3 \u0111\u00e1nh d\u00e0n l\u00f4 tr\u01b0\u1ee3t h\u00e0ng ng\u00e0y.<\/p>\n\n\n\n D\u00e0n \u0111\u1ec1 ch\u00e3o l\u00e0 g\u00ec? Theo t\u1eeb \u0111i\u1ec3n ti\u1ebfng Vi\u1ec7t th\u00ec ch\u00e3o c\u00f3 ngh\u0129a l\u00e0 d\u00e2y th\u1eebng, ho\u1eb7c ch\u1eafc ch\u1eafn. C\u00e1c d\u00e0n \u0111\u1ec1 ch\u00e3o th\u01b0\u1eddng g\u1ed3m 8x s\u1ed1. D\u00e2n ch\u01a1i \u0111\u1ec1 l\u1eadp c\u00e1c d\u00e0n ch\u00e3o 80 s\u1ed1, 84 s\u1ed1 ho\u1eb7c nhi\u1ec1u h\u01a1n \u0111\u1ec3 c\u00f3 t\u1ef7 l\u1ec7 tr\u00fang \u0111\u1ec1 ch\u1eafc \u0103n h\u01a1n.<\/p>\n\n\n\n C\u00e1c d\u00e0n \u0111\u1ec1 nhi\u1ec1u con s\u1ed1 nh\u01b0 th\u1ebf n\u00e0y ch\u1ec9 n\u00ean nu\u00f4i trong th\u1eddi gian ng\u1eafn h\u1ea1n. Ngo\u00e0i ra \u0111\u1ec3 \u0111\u00e1nh d\u00e0n \u0111\u1ec3 ch\u00e3o th\u00ec \u0111i\u1ec1u t\u1ea5t y\u1ebfu l\u00e0 h\u1ea7u bao ph\u1ea3i d\u00e0y.<\/p>\n\n\n\n Ta c\u00f3 d\u00e0n \u0111\u1eb7c bi\u1ec7t (\u0110B) mi\u1ec1n B\u1eafc \u0103n 100 ng\u00e0y c\u00f3 x\u00e1c su\u1ea5t v\u1ec1 cao nh\u1ea5t nh\u01b0 sau<\/p>\n\n\n\n M\u1ed9t ph\u01b0\u01a1ng ph\u00e1p \u0111\u00e1nh d\u00e0n \u0111\u1ec1 l\u00e2u \u0111\u1eddi n\u1eefa l\u00e0 \u0111\u00e1nh d\u00e0n theo 12 con gi\u00e1p. B\u1ea1n \u0111\u1ed1i chi\u1ebfu b\u1ea3ng 12 con gi\u00e1p s\u1ed1 \u0111\u1ec1 b\u00ean c\u1ea1nh tu\u1ed5i m\u00ecnh l\u00e0 g\u00ec v\u00e0 \u0111\u00e1nh d\u00e0n 8 ho\u1eb7c 9 s\u1ed1 \u0111\u1ec1 s\u1ebd v\u1ec1 ng\u00e0y h\u00f4m \u0111\u00f3.<\/p>\n\n\n\nD\u00e0n l\u00f4 \u0111\u1ec1 36s c\u00f3 d\u1ea1ng c\u00f4ng th\u1ee9c<\/strong><\/h3>\n\n\n\n
D\u00e0n l\u00f4 \u0111\u1ec1 3 \u2013 8 s\u1ed1<\/strong><\/h2>\n\n\n\n
D\u00e0n l\u00f4 \u0111\u1ec1 40 qu\u00e2n<\/strong><\/h2>\n\n\n\n
09 19 29 39 49 59 69 79 89 99 90 91 92 93 94 95 96 97 98
06 16 26 36 46 56 66 76 86 96 60 61 62 63 64 65 67 68 69
41 14
K\u1ebft qu\u1ea3 ng\u00e0y 06\/07\/2024 v\u1ec1 97.<\/p>\n\n\n\nD\u00e0n l\u00f4 \u0111\u1ec1 49 qu\u00e2n<\/strong><\/h2>\n\n\n\n
D\u00e0n \u0111\u1ec1 \u0111\u1eb7c bi\u1ec7t 50 qu\u00e2n<\/strong><\/h2>\n\n\n\n
Anh em xem th\u1ed1ng k\u00ea \u0111\u1ea7u \u0111u\u00f4i \u0111\u1eb7c bi\u1ec7t c\u1ee7a m\u1ed9t web XS b\u1ea5t k\u1ef3, ti\u1ebfn h\u00e0nh l\u1ecdc:<\/h5>\n\n\n\n
VD: th\u1ed1ng k\u00ea \u0111\u1ea7u \u0111u\u00f4i \u0111\u1eb7c bi\u1ec7t t\u00ednh t\u1edbi ng\u00e0y 11\/07\/2024, ta c\u00f3:<\/h5>\n\n\n\n
D\u00e0n \u0111\u1ec1 \u0111\u1eb7c bi\u1ec7t 56 s\u1ed1<\/strong><\/h2>\n\n\n\n
Soi c\u1ea7u d\u00e0n \u0111\u1eb7c bi\u1ec7t \u0111\u1ea7u<\/strong><\/h2>\n\n\n\n
D\u00e0n l\u00f4 \u0111\u1ec1 k\u00e9p<\/strong><\/h2>\n\n\n\n
D\u00e0n l\u00f4 \u0111\u1ec1 k\u00e9p \u00e2m<\/strong><\/h3>\n\n\n\n
D\u00e0n l\u00f4 \u0111\u1ec1 k\u00e9p l\u1ec7ch<\/strong><\/h3>\n\n\n\n
D\u00e0n l\u00f4 \u0111\u1ec1 s\u00e1t k\u00e9p (\u00e1p k\u00e9p)<\/strong><\/h3>\n\n\n\n
Nh\u1eefng b\u1ed9 s\u1ed1 g\u1ed3m 2 ch\u1eef s\u1ed1 ch\u00eanh l\u1ec7ch nhau 1 \u0111\u01a1n v\u1ecb \u0111\u01b0\u1ee3c g\u00f3p chung t\u1ea1o th\u00e0nh d\u00e0n \u0111\u1ec1 s\u00e1t k\u00e9p b\u1eb1ng. D\u00e0n \u0111\u1ec1 n\u00e0y g\u1ed3m c\u00f3 20 con s\u1ed1 nh\u01b0 sau:
01 10 12 21 32 23 34 43 45 54 56 65 76 67 78 87 89 98 90 09
C\u00e1c b\u00e1c l\u01b0u \u00fd l\u00e0 2 s\u1ed1 90 09 \u0111\u01b0\u1ee3c t\u00ednh nh\u01b0 l\u00e0 9 v\u00e0 10 n\u00ean v\u1eabn xem nh\u01b0 l\u00e0 b\u1ed9 s\u1ed1 s\u00e1t k\u00e9p l\u1ec7ch. Tuy nhi\u00ean s\u1ebd c\u00f3 n\u01a1i ghi \u0111\u1ec1 kh\u00f4ng t\u00ednh nh\u01b0 v\u1eady. C\u00e1c b\u00e1c \u0111i ghi \u0111\u1ec1 n\u00ean h\u1ecfi ng\u01b0\u1eddi ta cho r\u00f5.<\/li>
Ch\u00fang ta c\u00f3 b\u1ed9 s\u1ed1 s\u00e1t k\u00e9p b\u1eb1ng g\u1ed3m c\u00e1c s\u1ed1 s\u00e1t v\u1edbi b\u1ed9 k\u00e9o b\u1eb1ng. T\u01b0\u01a1ng t\u1ef1 s\u1ebd c\u00f3 b\u1ed9 s\u00e1t k\u00e9p l\u1ec7ch bao g\u1ed3m c\u00e1c s\u1ed1 s\u00e1t v\u1edbi b\u1ed9 k\u00e9p l\u1ec7ch. D\u00e0n \u0111\u1ec1 n\u00e0y c\u00f3 20 con s\u1ed1 nh\u01b0 sau:
04, 06, 49, 51, 15, 17, 60, 62, 26, 28, 71, 73, 37, 39, 82, 84, 48, 50, 93, 95<\/li><\/ol>\n\n\n\nD\u00e0n l\u00f4 \u0111\u1ec1 c\u00f3 thu\u1ed9c t\u00ednh ch\u1eb5n ho\u1eb7c l\u1ebb<\/strong><\/h2>\n\n\n\n
D\u00e0n l\u00f4 \u0111\u1ec1 \u0111\u1eb7c bi\u1ec7t ch\u1eb5n l\u1ebb<\/strong><\/h3>\n\n\n\n
D\u00e0n l\u00f4 \u0111\u1ec1 \u0111\u1eb7c bi\u1ec7t<\/strong> l\u1ebb ch\u1eb5n<\/strong><\/h3>\n\n\n\n
D\u00e0n l\u00f4 \u0111\u1ec1 \u0111\u1eb7c bi\u1ec7t<\/strong> ch\u1eb5n ch\u1eb5n<\/strong><\/h3>\n\n\n\n
D\u00e0n l\u00f4 \u0111\u1ec1 \u0111\u1eb7c bi\u1ec7t<\/strong> l\u1ebb l\u1ebb<\/strong><\/h3>\n\n\n\n
D\u00e0n l\u00f4 \u0111\u1ec1 \u0111\u1eb7c bi\u1ec7t<\/strong> trung gian<\/strong><\/h3>\n\n\n\n
M\u1ed9t s\u1ed1 d\u00e0n \u0111\u1eb7c bi\u1ec7t d\u1ec5 tr\u00fang kh\u00e1c<\/strong><\/h2>\n\n\n\n
D\u00e0n l\u00f4 \u0111\u1ec1 chia 3<\/strong><\/h3>\n\n\n\n
C\u00e1c d\u00e0n l\u00f4 \u0111\u1ec1 gan<\/strong><\/h3>\n\n\n\n
C\u00e1c d\u00e0n l\u00f4 \u0111\u1ec1 ch\u00e3o<\/strong><\/h3>\n\n\n\n
M\u1ed9t s\u1ed1 d\u00e0n l\u00f4 \u0111\u1ec1 \u0111\u1eb7c bi\u1ec7t kh\u00e1c<\/strong><\/h3>\n\n\n\n
D\u00e0n l\u00f4 \u0111\u1ec1 72 con<\/td> 01 02 03 04 05 06 07 08 12 13 15 17 21 22 23 224 25 26 27 28 29 30 31 32 33 34 35 37 38 40 42 43 44 45 47 48 49 52 53 58 60 61 62 63 64 65 67 68 70 71 72 73 74 75 76 77 78 79 80 82 83 84 85 86 87 88 89 92 94 95 97 98<\/td><\/tr> D\u00e0n l\u00f4 \u0111\u1ec1 60 con<\/td> 01 02 05 08 09 11 12 16 18 19 21 25 26 28 29 32 35 36 38 39 41 43 44 45 46 47 48 49 52 55 56 58 61 62 63 64 65 66 67 69 71 72 75 76 78 80 81 82 83 84 85 87 89 90 91 92 93 94 96 98<\/td><\/tr> D\u00e0n l\u00f4 \u0111\u1ec1 50 con<\/td> 02 03 13 15 19 21 23 24 28 30 31 32 34 37 39 41 42 43 46 47 48 49 50 51 52 56 58 59 61 65 68 69 70 73 74 75 76 77 78 79 82 83 84 85 86 89 91 92 93 94 95<\/td><\/tr> D\u00e0n l\u00f4 \u0111\u1ec1 44 con<\/td> 00 01 03 04 10 11 12 14 15 18 19 21 27 30 33 34 37 38 42 43 44 45 47 48 49 53 58 71 72 73 74 75 77 78 79 82 83 84 85 87 88 89<\/td><\/tr> D\u00e0n l\u00f4 \u0111\u1ec1 40 con<\/td> 12 13 15 17 21 23 24 27 28 31 32 33 34 35 37 38 42 43 44 45 47 48 49 53 58 71 72 73 74 75 77 78 79 82 83 84 85 87 88 89<\/td><\/tr> D\u00e0n l\u00f4 \u0111\u1ec1 16 con<\/td> 22 23 24 25 26 27 32 33 34 35 36 37 42 43 44 45<\/td><\/tr> D\u00e0n l\u00f4 \u0111\u1ec1 7 con<\/td> 02 03 04 05 06 07 08<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n C\u00e1ch \u0111\u00e1nh d\u00e0n l\u00f4 \u0111\u1ec1 theo b\u1ed9 12 con gi\u00e1p<\/strong><\/h3>\n\n\n\n