D\u00e0n \u0111\u1ec1 ch\u1ea1m l\u00e0 m\u1ed9t trong nh\u1eefng ki\u1ec3u ch\u01a1i kh\u00e1 th\u00fa v\u1ecb v\u00e0 c\u00f3 t\u00ednh kh\u1ea3 thi cao. Ng\u01b0\u1eddi ch\u01a1i ch\u1ec9 c\u1ea7n l\u1eafm r\u00f5 \u0111\u01b0\u1ee3c b\u1ea3n ch\u1ea5t l\u00e0 c\u00f3 th\u1ec3 ch\u1ecdn l\u1ef1a ch\u01a1i theo c\u00e1ch n\u00e0y hi\u1ec7u qu\u1ea3 nh\u1ea5t.<\/p>\n
N\u1ed9i dung b\u00e0i vi\u1ebft<\/p>\n<\/div>\n\n\n\u0110\u1ec1 ch\u1ea1m l\u00e0 g\u00ec?<\/li>\nC\u00e1c lo\u1ea1i \u0111\u1ec1 ch\u1ea1m c\u01a1 b\u1ea3n g\u1ed3m nh\u1eefng con g\u00ec?\n\n\u0110\u1ec1 ch\u1ea1m 0<\/li>\n\u0110\u1ec1 ch\u1ea1m 1 c\u00f3 bao nhi\u00eau con?<\/li>\n\u0110\u1ec1 ch\u1ea1m 2 l\u00e0 nh\u1eefng con g\u00ec?<\/li>\n\u0110\u1ec1 ch\u1ea1m 3<\/li>\n\u0110\u1ec1 ch\u1ea1m 4 g\u1ed3m nh\u1eefng con s\u1ed1 n\u00e0o?<\/li>\n\u0110\u1ec1 ch\u1ea1m 5 l\u00e0 sao?<\/li>\n\u0110\u1ec1 ch\u1ea1m 6 c\u00f3 bao nhi\u00eau con?<\/li>\n\u0110\u1ec1 ch\u1ea1m 7 ch\u01a1i nh\u01b0 th\u1ebf n\u00e0o?<\/li>\n\u0110\u1ec1 ch\u1ea1m 8 th\u00ec sao?<\/li>\n\u0110\u1ec1 ch\u1ea1m 9 l\u00e0 nh\u1eefng con g\u00ec?<\/li>\n<\/ul>\n<\/li>\nC\u00e1ch t\u00ednh ch\u1ea1m \u0111\u1ec1: \u0110\u00e1nh \u0111\u1ec1 ch\u1ea1m \u0103n \u0111\u01b0\u1ee3c bao nhi\u00eau ti\u1ec1n?<\/li>\n<\/ul>\n<\/nav>\n<\/div>\n<\/span>\u0110\u1ec1 ch\u1ea1m l\u00e0 g\u00ec?<\/h2>\nNhi\u1ec1u ng\u01b0\u1eddi v\u1eabn ch\u01b0a hi\u1ec3u \u0111\u01b0\u1ee3c r\u00f5 \u00fd ngh\u0129a c\u1ee7a lo\u1ea1i \u0111\u1ec1 n\u00e0y. T\u00ean g\u1ecdi kh\u00e1c c\u00f2n l\u00e0 ch\u1ea1m \u0111\u1ec1 nu\u00f4i. Ch\u00fang ta c\u00f3 th\u1ec3 hi\u1ec3u theo c\u00e1ch nh\u01b0 sau:<\/p>\n\u0110\u00f3 l\u00e0 nh\u1eefng con s\u1ed1 m\u00e0 c\u00f3 c\u00f9ng gi\u1ed1ng nhau \u1edf 1 ch\u1eef s\u1ed1. Con s\u1ed1 gi\u1ed1ng nhau chung n\u00e0y g\u1ecdi l\u00e0 d\u00ednh 1 s\u1ed1. C\u00e1c s\u1ed1 n\u00e0y \u0111\u01b0\u1ee3c th\u1ed1ng k\u00ea, d\u1ef1 \u0111o\u00e1n kh soi c\u1ea7u tr\u00f9ng v\u1edbi 1 trong 2 s\u1ed1 c\u1ee7a gi\u1ea3i mi\u1ec1n b\u1eafc.<\/p>\nTrong \u0111\u00e1nh ch\u1ea1m \u0111\u1ec1, ng\u01b0\u1eddi ch\u01a1i s\u1ebd th\u1ef1c hi\u1ec7n soi c\u1ea7u \u0111\u1ec1 d\u00e0n ch\u1ea1m \u0111\u1ec1 t\u1eeb \u0111\u00f3 gi\u00fap t\u0103ng t\u1ec9 l\u1ec7 \u0103n nhi\u1ec1u h\u01a1n. V\u00ec v\u1eady, nhi\u1ec1u ng\u01b0\u1eddi c\u00f3 th\u1ec3 hi\u1ec3u \u0111\u01a1n gi\u00e0n \u0111\u00e2y l\u00e0 t\u1eadp h\u1ee3p c\u00e1c s\u1ed1 c\u00f3 \u00edt nh\u1ea5t l\u00e0 1 ch\u1eef s\u1ed1 trong \u0111\u00f3 gi\u1ed1ng nhau.<\/p>\nC\u00e1c s\u1ed1 trong d\u00e0n \u0111\u1ec1 ch\u1ea1m n\u00e0y \u0111\u01b0\u1ee3c gh\u00e9p t\u1eeb 10 s\u1ed1 \u0111\u01a1n l\u1ebb. V\u00ec v\u1eady \u0111\u01b0\u1ee3c chia th\u00e0nh 10 ch\u1ea1m kh\u00e1c nhau t\u1eeb 0 \u0111\u1ebfn 9.<\/p>\n<\/span>C\u00e1c lo\u1ea1i \u0111\u1ec1 ch\u1ea1m c\u01a1 b\u1ea3n g\u1ed3m nh\u1eefng con g\u00ec?<\/h2>\n<\/p>\nAnh em \u0111\u00e3 bi\u1ebft c\u00f3 10 ch\u1ea1m s\u1ed1 kh\u00e1c nhau, n\u1ebfu v\u1eabn ch\u01b0a n\u1eafm r\u00f5 \u0111\u01b0\u1ee3c m\u1ed7i ch\u1ea1m \u0111\u00f3 g\u1ed3m nh\u1eefng s\u1ed1 n\u00e0o th\u00ec c\u00f3 th\u1ec3 tham kh\u1ea3o t\u1eebng ch\u1ea1m sau \u0111\u00e2y:<\/p>\n<\/span>\u0110\u1ec1 ch\u1ea1m 0<\/h3>\n\u0110\u00e2y l\u00e0 d\u00e0n ch\u1ea1m c\u00f3 ch\u1ee9a s\u1ed1 0 xu\u1ea5t hi\u1ec7n. Theo \u0111\u00f3 ch\u00fang ta c\u00f3 th\u1ec3 gh\u00e9p \u0111\u01b0\u1ee3c 19 con s\u1ed1 kh\u00e1c nhau v\u1edbi s\u1ed1 0 t\u01b0\u01a1ng \u1ee9ng l\u00e0 00, 01, 10, 02, 20, 03, 30, 04, 40, 05, 50, 06, 60, 07, 70, 08, 80, 09, 90. Ng\u01b0\u1eddi ch\u01a1i khi \u0111\u00e1nh d\u00e0n ch\u1ea1m s\u1ed1 0 c\u00f3 th\u1ec3 tham kh\u1ea3o d\u00e3y n\u00e0y.<\/p>\n<\/span>\u0110\u1ec1 ch\u1ea1m 1 c\u00f3 bao nhi\u00eau con?<\/h3>\nT\u01b0\u01a1ng t\u1ef1 nh\u01b0 d\u00e0n ch\u1ea1m s\u1ed1 0 th\u00ec d\u00e0n s\u1ed1 1 c\u00f3 19 con s\u1ed1 t\u1ea5t c\u1ea3. C\u00e1c s\u1ed1 \u0111\u00f3 \u0111\u1ec1u ch\u1ee9a s\u1ed1 1 trong \u0111\u00f3. C\u1ee5 th\u1ec3 g\u1ed3m c\u00e1c s\u1ed1 sau \u0111\u00e2y: 01, 10, 11, 12, 21, 13, 31, 14, 41, 15, 51, 16, 61, 17, 71, 18, 81, 19, 91.<\/p>\n<\/span>\u0110\u1ec1 ch\u1ea1m 2 l\u00e0 nh\u1eefng con g\u00ec?<\/h3>\nCh\u1ecdn l\u1ef1a d\u00e0n s\u1ed1 2 v\u1edbi c\u00e1c con s\u1ed1: 02, 20, 22, 23, 32, 24, 42, 25, 52, 26, 62, 27, 72, 28, 82, 29, 92. C\u00f3 th\u1ec3 th\u1ea5y, d\u00e0n ch\u1ea1m n\u00e0y chung nhau \u1edf m\u1ed7i s\u1ed1 l\u00e0 con s\u1ed1 2 v\u00e0 xu\u1ea5t hi\u1ec7n 19 c\u1eb7p s\u1ed1 cho ch\u00fang ta l\u1ef1a ch\u1ecdn.<\/p>\n<\/span>\u0110\u1ec1 ch\u1ea1m 3<\/h3>\nB\u1ed9 d\u00e0n \u0111\u1ec1 ch\u1ea1m s\u1ed1 3 \u0111\u01b0\u1ee3c ch\u1ee9a s\u1ed1 3 l\u00e0m con s\u1ed1 chung, trong \u0111\u00f3 c\u00f3 t\u1ea5t c\u1ea3 19 s\u1ed1 t\u1ea5t c\u1ea3.<\/p>\n<\/span>\u0110\u1ec1 ch\u1ea1m 4 g\u1ed3m nh\u1eefng con s\u1ed1 n\u00e0o?<\/h3>\nT\u01b0\u01a1ng t\u1ef1 nh\u01b0 v\u1eady, \u1edf s\u1ed1 4 nh\u1eefng con s\u1ed1 sau s\u1ebd xu\u1ea5t hi\u1ec7n: 04, 40, 41, 14, 24, 42, 34, 43, 44, 45, 54, 46, 64, 47, 74, 48, 84, 49, 94. C\u00e1c con s\u1ed1 n\u00e0y c\u00f3 \u0111i\u1ec3m chung l\u00e0 \u0111i\u1ec1u ch\u1ee9a s\u1ed1 4 \u00edt nh\u1ea5t 1 l\u1ea7n.<\/p>\n<\/span>\u0110\u1ec1 ch\u1ea1m 5 l\u00e0 sao?<\/h3>\nS\u1ed1 5 s\u1ebd xu\u1ea5t hi\u1ec7n \u00edt nh\u1ea5t 1 l\u1ea7n trong c\u00e1c s\u1ed1 thu\u1ed9c d\u00e3y \u0111\u1ec1 ch\u1ea1m s\u1ed1 5. Bao g\u1ed3m 19 con s\u1ed1 sau: 05, 50, 15, 51, 25, 52, 35, 53, 45, 54, 55, 56, 65, 57, 75, 58, 85, 59, 95<\/p>\n<\/span>\u0110\u1ec1 ch\u1ea1m 6 c\u00f3 bao nhi\u00eau con?<\/h3>\n\u0110\u1ec1 ch\u1ea1m s\u1ed1 6 khi li\u1ec7t k\u00ea s\u1ebd c\u00f3 19 con s\u1ed1 kh\u00e1c nhau. C\u00e1c con s\u1ed1 s\u1ebd ch\u1ee9a \u00edt nh\u1ea5t 1 l\u1ea7n s\u1ed1 6. Bao g\u1ed3m c\u00e1c s\u1ed1 sau \u0111\u00e2y: 06, 60, 16, 61, 26, 62, 36, 63, 46, 64, 56, 65, 66, 67, 76, 68, 86, 69, 96.<\/p>\n<\/p>\n<\/span>\u0110\u1ec1 ch\u1ea1m 7 ch\u01a1i nh\u01b0 th\u1ebf n\u00e0o?<\/h3>\nKhi ch\u01a1i ch\u1ea1m \u0111\u1ec1 s\u1ed1 7 b\u1ea1n c\u00f3 th\u1ec3 l\u1ef1a ch\u1ecdn c\u00e1c con s\u1ed1 nh\u01b0: 07, 70, 17, 71, \u2026, 97. V\u1edbi 19 con s\u1ed1 kh\u00e1c nhau \u0111\u1ec1u ch\u1ee9a chung \u00edt nh\u1ea5t 1 s\u1ed1 7.<\/p>\n<\/span>\u0110\u1ec1 ch\u1ea1m 8 th\u00ec sao?<\/h3>\nV\u1edbi \u0111\u1ec1 ch\u1ea1m s\u1ed1 8 th\u00ec con s\u1ed1 chung l\u00e0 s\u1ed1 8 ch\u1ee9a \u00edt nh\u1ea5t 1 l\u1ea7n \u1edf m\u1ed7i s\u1ed1 \u0111\u01b0\u1ee3c l\u1ef1a ch\u1ecdn. C\u00e1c s\u1ed1 \u0111\u00f3 l\u00e0: 08, 80, 18, 81, 28, 82, 38, 83, 48, 84, 58, 85, 68, 86, 78, 87, 88, 89, 98.<\/p>\n<\/span>\u0110\u1ec1 ch\u1ea1m 9 l\u00e0 nh\u1eefng con g\u00ec?<\/h3>\nNh\u1eefng con s\u1ed1 thu\u1ed9c \u0111\u1ec1 ch\u1ea1m 9 bao g\u1ed3m: 09, 90, \u2026, 89, 98, 99. Ch\u00fang \u0111\u1ec1u xu\u1ea5t hi\u1ec7n con s\u1ed1 9 l\u00e0 \u0111i\u1ec3m chung.<\/p>\n<\/span>C\u00e1ch t\u00ednh ch\u1ea1m \u0111\u1ec1: \u0110\u00e1nh \u0111\u1ec1 ch\u1ea1m \u0103n \u0111\u01b0\u1ee3c bao nhi\u00eau ti\u1ec1n?<\/h2>\nKhi ch\u01a1i d\u00e0n ch\u1ea1m ngh\u0129a l\u00e0 ng\u01b0\u1eddi ch\u01a1i s\u1ebd t\u00ednh t\u1ed5ng tr\u00ean 19 con s\u1ed1 kh\u00e1c nhau. Ch\u00fang ta c\u00f3 th\u1ec3 xem l\u00e0 20 s\u1ed1 b\u1edfi th\u01b0\u1eddng c\u00f3 t\u00ednh ch\u1ea1m \u0111\u1ea7u v\u00e0 ch\u1ea1m cu\u1ed1i. T\u00f9y theo quy \u01b0\u1edbc ch\u01a1i v\u00e0 c\u00e1ch ch\u01a1i trong l\u00f4 \u0111\u00ea l\u1ea1i l\u00e0 19 \u0111\u00e3 b\u1ecf \u0111i 1 l\u00f4 \u0111\u1ec1 k\u00e9p ho\u1eb7c l\u00e0 20 khi t\u00ednh con \u0111\u1ec1 k\u00e9p xu\u1ea5t hi\u1ec7n 2 l\u1ea7n.<\/p>\nV\u1edbi c\u00e1c c\u00e1ch ch\u01a1i kh\u00e1c nhau t\u1ef7 l\u1ec7 \u0103n s\u1ebd kh\u00e1c nhau. Do \u0111\u00f3 \u1edf c\u00e1c v\u00f9ng s\u1ebd c\u00f3 c\u00e1ch c\u00e1ch t\u00ednh b\u1eb1ng 1 khi tr\u00fang \u0111\u1ec1. N\u1ebfu nh\u01b0 tr\u00fang v\u00e0o \u0111\u1ec1 k\u00e9p th\u00ec c\u00f3 th\u1ec3 t\u00ednh 1 l\u1ea7n t\u01b0\u01a1ng t\u1ef1 nh\u01b0 c\u00e1c con \u0111\u1ec1 kh\u00e1c \u1edf c\u00e1ch t\u00ednh 19. N\u1ebfu nh\u01b0 c\u00e1ch t\u00ednh l\u00e0 20 con s\u1ed1 th\u00ec \u0111\u1ec1 v\u1ec1 con s\u1ed1 k\u00e9p th\u00ec \u0111\u01b0\u1ee3c t\u00ednh l\u00e0 2 l\u1ea7n tr\u00fang ti\u1ec1n v\u00e0 \u0111\u01b0\u1ee3c \u0103n g\u1ea5p 2 l\u1ea7n.<\/p>\nth\u1ea7n t\u00e0i ch\u1ed1t s\u1ed1 mi\u1ec1n b\u1eafc cao c\u1ea5p<\/span><\/strong><\/h4>\n\n\n\nc\u1ea7u b\u1ea1ch th\u1ee7 l\u00f4 2 nh\u00e1y<\/span><\/a><\/span><\/strong><\/td>\ns\u1ed1 b\u1ea1ch th\u1ee7 \u0111\u1ec1 mb<\/span><\/a><\/strong><\/span><\/td>\n<\/tr>\n\ns\u1ed1 b\u1ea1ch th\u1ee7 l\u00f4 mb<\/span><\/a><\/strong><\/span><\/td>\ns\u1ed1 song th\u1ee7 \u0111\u1ec1 mb<\/span><\/a><\/strong><\/span><\/td>\n<\/tr>\n\ns\u1ed1 song th\u1ee7 l\u00f4 mb<\/span><\/a><\/strong><\/span><\/td>\ns\u1ed1 d\u00e0n \u0111\u1ec1 4 s\u1ed1 mb<\/span><\/a><\/strong><\/span><\/td>\n<\/tr>\n\ns\u1ed1 d\u00e0n \u0111\u1ec1 6 s\u1ed1 mb<\/span><\/a><\/strong><\/span><\/td>\ns\u1ed1 d\u00e0n \u0111\u1ec1 8 s\u1ed1 mb<\/span><\/a><\/strong><\/span><\/td>\n<\/tr>\n\ns\u1ed1 d\u00e0n \u0111\u1ec1 10 s\u1ed1 mb<\/span><\/a><\/strong><\/span><\/td>\nsong th\u1ee7 l\u00f4 k\u00e9p mb<\/span><\/a><\/strong><\/span><\/td>\n<\/tr>\n\nb\u1ea1ch th\u1ee7 l\u00f4 k\u00e9p mb<\/span><\/a><\/strong><\/span><\/td>\ns\u1ed1 d\u00e0n l\u00f4 4 s\u1ed1 mb<\/span><\/a><\/strong><\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\nth\u1ea7n t\u00e0i ch\u1ed1t s\u1ed1 mi\u1ec1n b\u1eafc<\/span><\/strong><\/h4>\n\n\n\ns\u1ed1 v\u00edp d\u00e0n l\u00f4 8 s\u1ed1 mb<\/span><\/a><\/span><\/strong><\/td>\ns\u1ed1 v\u00edp 3 c\u00e0ng mb<\/span><\/a><\/strong><\/span><\/td>\n<\/tr>\n\ns\u1ed1 v\u00edp d\u00e0n l\u00f4 xi\u00ean 2 mb<\/span><\/a><\/strong><\/span><\/td>\nd\u00e0n 3 c\u00e0ng 2 s\u1ed1 mb<\/span><\/a><\/strong><\/span><\/td>\n<\/tr>\n\ns\u1ed1 v\u00edp d\u00e0n l\u00f4 xi\u00ean 3 mb<\/span><\/a>\n<\/strong><\/span><\/td>\ns\u1ed1 v\u00edp d\u00e0n l\u00f4 10 s\u1ed1 mb<\/span><\/a><\/strong><\/span><\/td>\n<\/tr>\n\ns\u1ed1 v\u00edp d\u00e0n l\u00f4 xi\u00ean 4 mb<\/span><\/a><\/strong><\/span><\/td>\ns\u1ed1 v\u00edp \u0111\u1ec1 \u0111\u1ea7u \u0111u\u00f4i mb<\/span><\/a><\/strong><\/span><\/td>\n<\/tr>\n\ns\u1ed1 v\u00edp d\u00e0n l\u00f4 6 s\u1ed1 mb<\/span><\/a><\/strong><\/span><\/td>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\nth\u1ea7n t\u00e0i ch\u1ed1t s\u1ed1 mi\u1ec1n nam<\/span><\/strong><\/h4>\n\n\n\nchu\u1ea9n x\u00e1c x\u1ec9u ch\u1ee7 mn<\/span><\/strong><\/a><\/td>\nchu\u1ea9n x\u00e1c song th\u1ee7 l\u00f4 mn<\/span><\/strong><\/a><\/td>\n<\/tr>\n\nchu\u1ea9n x\u00e1c gi\u1ea3i \u0111\u1eb7c bi\u1ec7t<\/span><\/strong><\/a><\/td>\n\u0111\u1ea7u \u0111u\u00f4i gi\u1ea3i 8 mn<\/span><\/strong><\/a><\/td>\n<\/tr>\n\nchu\u1ea9n x\u00e1c gi\u1ea3i 8 mn<\/span><\/strong><\/a><\/td>\n\u0111\u1ea7u \u0111u\u00f4i \u0111\u1eb7c bi\u1ec7t mn<\/span><\/strong><\/a><\/td>\n<\/tr>\n\nchu\u1ea9n x\u00e1c bao l\u00f4 mn<\/span><\/a><\/strong><\/span><\/td>\nchu\u1ea9n x\u00e1c l\u00f4 3 s\u1ed1 mn<\/span><\/strong><\/a><\/td>\n<\/tr>\n\nchu\u1ea9n x\u00e1c c\u1eb7p x\u1ec9u ch\u1ee7 mn<\/span><\/a><\/strong><\/td>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\nth\u1ea7n t\u00e0i ch\u1ed1t s\u1ed1 mi\u1ec1n trung<\/span><\/strong><\/h4>\n\n\n\nch\u1ed1t s\u1ed1 v\u00edp x\u1ec9u ch\u1ee7 mt<\/span><\/strong><\/a><\/td>\nch\u1ed1t s\u1ed1 v\u00edp song th\u1ee7 l\u00f4 mt<\/span><\/strong><\/a><\/td>\n<\/tr>\n\nch\u1ed1t s\u1ed1 gi\u1ea3i \u0111\u1eb7c bi\u1ec7t mt<\/span><\/strong><\/a><\/td>\nch\u1ed1t s\u1ed1 \u0111\u1ea7u \u0111u\u00f4i gi\u1ea3i 8 mt<\/span><\/strong><\/a><\/td>\n<\/tr>\n\nch\u1ed1t s\u1ed1 to v\u00edp gi\u1ea3i 8 mt<\/span><\/strong><\/a><\/td>\nch\u1ed1t s\u1ed1 \u0111\u1ea7u \u0111u\u00f4i \u0111\u1eb7c bi\u1ec7t<\/span><\/strong><\/a><\/td>\n<\/tr>\n\nch\u1ed1t v\u00edp x\u00e1c bao l\u00f4 mt<\/span><\/strong><\/a><\/td>\nch\u1ed1t s\u1ed1 v\u00edp l\u00f4 3 s\u1ed1 mt<\/span><\/strong><\/a><\/td>\n<\/tr>\n\nch\u1ed1t s\u1ed1 v\u00edp c\u1eb7p x\u1ec9u ch\u1ee7 mt<\/span><\/strong><\/a><\/td>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"excerpt":{"rendered":"D\u00e0n \u0111\u1ec1 ch\u1ea1m l\u00e0 m\u1ed9t trong nh\u1eefng ki\u1ec3u ch\u01a1i kh\u00e1 th\u00fa v\u1ecb v\u00e0 c\u00f3 t\u00ednh kh\u1ea3 thi cao. Ng\u01b0\u1eddi ch\u01a1i ch\u1ec9 c\u1ea7n l\u1eafm r\u00f5 \u0111\u01b0\u1ee3c b\u1ea3n ch\u1ea5t l\u00e0 c\u00f3 th\u1ec3 ch\u1ecdn l\u1ef1a ch\u01a1i theo c\u00e1ch n\u00e0y hi\u1ec7u qu\u1ea3 nh\u1ea5t. N\u1ed9i dung b\u00e0i vi\u1ebft \u0110\u1ec1 ch\u1ea1m l\u00e0 g\u00ec? C\u00e1c lo\u1ea1i \u0111\u1ec1 ch\u1ea1m c\u01a1 b\u1ea3n g\u1ed3m nh\u1eefng […]<\/p>\n","protected":false},"author":1,"featured_media":18427,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[314],"tags":[3721,3718,3515,3726,3731,3512,3519,3733,3725,3724,3727,3722,3723,3735,3729,3740,3737,3734,3743,3741,3738,3742,3739,3728,3732,3720,3717,3736,3730,3719],"yoast_head":"\n\u0110\u1ec1 ch\u1ea1m l\u00e0 g\u00ec ? C\u00e1c lo\u1ea1i \u0111\u1ec1 ch\u1ea1m g\u1ed3m nh\u1eefng con s\u1ed1 n\u00e0o ?<\/title>\n<meta name=\"description\" content=\"\u0110\u1ec1 ch\u1ea1m l\u00e0 g\u00ec ? 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C\u00e1c lo\u1ea1i \u0111\u1ec1 ch\u1ea1m g\u1ed3m nh\u1eefng con s\u1ed1 n\u00e0o ?"}]},{"@type":"WebSite","@id":"https:\/\/soicausieuchuan365.com\/#website","url":"https:\/\/soicausieuchuan365.com\/","name":"cach soi cau lo de - cau soi mb - soi cau lo de","description":"cach soi cau lo de - cau soi mb - soi cau lo de","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/soicausieuchuan365.com\/?s={search_term_string}"},"query-input":"required name=search_term_string"}],"inLanguage":"vi"},{"@type":"Person","@id":"https:\/\/soicausieuchuan365.com\/#\/schema\/person\/6a90ef6e7fc13ee8090a90270d7841d5","name":"admin","image":{"@type":"ImageObject","inLanguage":"vi","@id":"https:\/\/soicausieuchuan365.com\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/74cae801e3ee021d171dcbceb1ba1db9?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/74cae801e3ee021d171dcbceb1ba1db9?s=96&d=mm&r=g","caption":"admin"},"url":"https:\/\/soicausieuchuan365.com\/author\/dev-singsing\/"}]}},"_links":{"self":[{"href":"https:\/\/soicausieuchuan365.com\/wp-json\/wp\/v2\/posts\/18424"}],"collection":[{"href":"https:\/\/soicausieuchuan365.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/soicausieuchuan365.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/soicausieuchuan365.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/soicausieuchuan365.com\/wp-json\/wp\/v2\/comments?post=18424"}],"version-history":[{"count":0,"href":"https:\/\/soicausieuchuan365.com\/wp-json\/wp\/v2\/posts\/18424\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/soicausieuchuan365.com\/wp-json\/wp\/v2\/media\/18427"}],"wp:attachment":[{"href":"https:\/\/soicausieuchuan365.com\/wp-json\/wp\/v2\/media?parent=18424"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/soicausieuchuan365.com\/wp-json\/wp\/v2\/categories?post=18424"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/soicausieuchuan365.com\/wp-json\/wp\/v2\/tags?post=18424"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
Nhi\u1ec1u ng\u01b0\u1eddi v\u1eabn ch\u01b0a hi\u1ec3u \u0111\u01b0\u1ee3c r\u00f5 \u00fd ngh\u0129a c\u1ee7a lo\u1ea1i \u0111\u1ec1 n\u00e0y. T\u00ean g\u1ecdi kh\u00e1c c\u00f2n l\u00e0 ch\u1ea1m \u0111\u1ec1 nu\u00f4i. Ch\u00fang ta c\u00f3 th\u1ec3 hi\u1ec3u theo c\u00e1ch nh\u01b0 sau:<\/p>\n
\u0110\u00f3 l\u00e0 nh\u1eefng con s\u1ed1 m\u00e0 c\u00f3 c\u00f9ng gi\u1ed1ng nhau \u1edf 1 ch\u1eef s\u1ed1. Con s\u1ed1 gi\u1ed1ng nhau chung n\u00e0y g\u1ecdi l\u00e0 d\u00ednh 1 s\u1ed1. C\u00e1c s\u1ed1 n\u00e0y \u0111\u01b0\u1ee3c th\u1ed1ng k\u00ea, d\u1ef1 \u0111o\u00e1n kh soi c\u1ea7u tr\u00f9ng v\u1edbi 1 trong 2 s\u1ed1 c\u1ee7a gi\u1ea3i mi\u1ec1n b\u1eafc.<\/p>\n
Trong \u0111\u00e1nh ch\u1ea1m \u0111\u1ec1, ng\u01b0\u1eddi ch\u01a1i s\u1ebd th\u1ef1c hi\u1ec7n soi c\u1ea7u \u0111\u1ec1 d\u00e0n ch\u1ea1m \u0111\u1ec1 t\u1eeb \u0111\u00f3 gi\u00fap t\u0103ng t\u1ec9 l\u1ec7 \u0103n nhi\u1ec1u h\u01a1n. V\u00ec v\u1eady, nhi\u1ec1u ng\u01b0\u1eddi c\u00f3 th\u1ec3 hi\u1ec3u \u0111\u01a1n gi\u00e0n \u0111\u00e2y l\u00e0 t\u1eadp h\u1ee3p c\u00e1c s\u1ed1 c\u00f3 \u00edt nh\u1ea5t l\u00e0 1 ch\u1eef s\u1ed1 trong \u0111\u00f3 gi\u1ed1ng nhau.<\/p>\n
C\u00e1c s\u1ed1 trong d\u00e0n \u0111\u1ec1 ch\u1ea1m n\u00e0y \u0111\u01b0\u1ee3c gh\u00e9p t\u1eeb 10 s\u1ed1 \u0111\u01a1n l\u1ebb. V\u00ec v\u1eady \u0111\u01b0\u1ee3c chia th\u00e0nh 10 ch\u1ea1m kh\u00e1c nhau t\u1eeb 0 \u0111\u1ebfn 9.<\/p>\n
<\/p>\n
Anh em \u0111\u00e3 bi\u1ebft c\u00f3 10 ch\u1ea1m s\u1ed1 kh\u00e1c nhau, n\u1ebfu v\u1eabn ch\u01b0a n\u1eafm r\u00f5 \u0111\u01b0\u1ee3c m\u1ed7i ch\u1ea1m \u0111\u00f3 g\u1ed3m nh\u1eefng s\u1ed1 n\u00e0o th\u00ec c\u00f3 th\u1ec3 tham kh\u1ea3o t\u1eebng ch\u1ea1m sau \u0111\u00e2y:<\/p>\n
\u0110\u00e2y l\u00e0 d\u00e0n ch\u1ea1m c\u00f3 ch\u1ee9a s\u1ed1 0 xu\u1ea5t hi\u1ec7n. Theo \u0111\u00f3 ch\u00fang ta c\u00f3 th\u1ec3 gh\u00e9p \u0111\u01b0\u1ee3c 19 con s\u1ed1 kh\u00e1c nhau v\u1edbi s\u1ed1 0 t\u01b0\u01a1ng \u1ee9ng l\u00e0 00, 01, 10, 02, 20, 03, 30, 04, 40, 05, 50, 06, 60, 07, 70, 08, 80, 09, 90. Ng\u01b0\u1eddi ch\u01a1i khi \u0111\u00e1nh d\u00e0n ch\u1ea1m s\u1ed1 0 c\u00f3 th\u1ec3 tham kh\u1ea3o d\u00e3y n\u00e0y.<\/p>\n
T\u01b0\u01a1ng t\u1ef1 nh\u01b0 d\u00e0n ch\u1ea1m s\u1ed1 0 th\u00ec d\u00e0n s\u1ed1 1 c\u00f3 19 con s\u1ed1 t\u1ea5t c\u1ea3. C\u00e1c s\u1ed1 \u0111\u00f3 \u0111\u1ec1u ch\u1ee9a s\u1ed1 1 trong \u0111\u00f3. C\u1ee5 th\u1ec3 g\u1ed3m c\u00e1c s\u1ed1 sau \u0111\u00e2y: 01, 10, 11, 12, 21, 13, 31, 14, 41, 15, 51, 16, 61, 17, 71, 18, 81, 19, 91.<\/p>\n
Ch\u1ecdn l\u1ef1a d\u00e0n s\u1ed1 2 v\u1edbi c\u00e1c con s\u1ed1: 02, 20, 22, 23, 32, 24, 42, 25, 52, 26, 62, 27, 72, 28, 82, 29, 92. C\u00f3 th\u1ec3 th\u1ea5y, d\u00e0n ch\u1ea1m n\u00e0y chung nhau \u1edf m\u1ed7i s\u1ed1 l\u00e0 con s\u1ed1 2 v\u00e0 xu\u1ea5t hi\u1ec7n 19 c\u1eb7p s\u1ed1 cho ch\u00fang ta l\u1ef1a ch\u1ecdn.<\/p>\n
B\u1ed9 d\u00e0n \u0111\u1ec1 ch\u1ea1m s\u1ed1 3 \u0111\u01b0\u1ee3c ch\u1ee9a s\u1ed1 3 l\u00e0m con s\u1ed1 chung, trong \u0111\u00f3 c\u00f3 t\u1ea5t c\u1ea3 19 s\u1ed1 t\u1ea5t c\u1ea3.<\/p>\n
T\u01b0\u01a1ng t\u1ef1 nh\u01b0 v\u1eady, \u1edf s\u1ed1 4 nh\u1eefng con s\u1ed1 sau s\u1ebd xu\u1ea5t hi\u1ec7n: 04, 40, 41, 14, 24, 42, 34, 43, 44, 45, 54, 46, 64, 47, 74, 48, 84, 49, 94. C\u00e1c con s\u1ed1 n\u00e0y c\u00f3 \u0111i\u1ec3m chung l\u00e0 \u0111i\u1ec1u ch\u1ee9a s\u1ed1 4 \u00edt nh\u1ea5t 1 l\u1ea7n.<\/p>\n
S\u1ed1 5 s\u1ebd xu\u1ea5t hi\u1ec7n \u00edt nh\u1ea5t 1 l\u1ea7n trong c\u00e1c s\u1ed1 thu\u1ed9c d\u00e3y \u0111\u1ec1 ch\u1ea1m s\u1ed1 5. Bao g\u1ed3m 19 con s\u1ed1 sau: 05, 50, 15, 51, 25, 52, 35, 53, 45, 54, 55, 56, 65, 57, 75, 58, 85, 59, 95<\/p>\n
\u0110\u1ec1 ch\u1ea1m s\u1ed1 6 khi li\u1ec7t k\u00ea s\u1ebd c\u00f3 19 con s\u1ed1 kh\u00e1c nhau. C\u00e1c con s\u1ed1 s\u1ebd ch\u1ee9a \u00edt nh\u1ea5t 1 l\u1ea7n s\u1ed1 6. Bao g\u1ed3m c\u00e1c s\u1ed1 sau \u0111\u00e2y: 06, 60, 16, 61, 26, 62, 36, 63, 46, 64, 56, 65, 66, 67, 76, 68, 86, 69, 96.<\/p>\n
Khi ch\u01a1i ch\u1ea1m \u0111\u1ec1 s\u1ed1 7 b\u1ea1n c\u00f3 th\u1ec3 l\u1ef1a ch\u1ecdn c\u00e1c con s\u1ed1 nh\u01b0: 07, 70, 17, 71, \u2026, 97. V\u1edbi 19 con s\u1ed1 kh\u00e1c nhau \u0111\u1ec1u ch\u1ee9a chung \u00edt nh\u1ea5t 1 s\u1ed1 7.<\/p>\n
V\u1edbi \u0111\u1ec1 ch\u1ea1m s\u1ed1 8 th\u00ec con s\u1ed1 chung l\u00e0 s\u1ed1 8 ch\u1ee9a \u00edt nh\u1ea5t 1 l\u1ea7n \u1edf m\u1ed7i s\u1ed1 \u0111\u01b0\u1ee3c l\u1ef1a ch\u1ecdn. C\u00e1c s\u1ed1 \u0111\u00f3 l\u00e0: 08, 80, 18, 81, 28, 82, 38, 83, 48, 84, 58, 85, 68, 86, 78, 87, 88, 89, 98.<\/p>\n
Nh\u1eefng con s\u1ed1 thu\u1ed9c \u0111\u1ec1 ch\u1ea1m 9 bao g\u1ed3m: 09, 90, \u2026, 89, 98, 99. Ch\u00fang \u0111\u1ec1u xu\u1ea5t hi\u1ec7n con s\u1ed1 9 l\u00e0 \u0111i\u1ec3m chung.<\/p>\n
Khi ch\u01a1i d\u00e0n ch\u1ea1m ngh\u0129a l\u00e0 ng\u01b0\u1eddi ch\u01a1i s\u1ebd t\u00ednh t\u1ed5ng tr\u00ean 19 con s\u1ed1 kh\u00e1c nhau. Ch\u00fang ta c\u00f3 th\u1ec3 xem l\u00e0 20 s\u1ed1 b\u1edfi th\u01b0\u1eddng c\u00f3 t\u00ednh ch\u1ea1m \u0111\u1ea7u v\u00e0 ch\u1ea1m cu\u1ed1i. T\u00f9y theo quy \u01b0\u1edbc ch\u01a1i v\u00e0 c\u00e1ch ch\u01a1i trong l\u00f4 \u0111\u00ea l\u1ea1i l\u00e0 19 \u0111\u00e3 b\u1ecf \u0111i 1 l\u00f4 \u0111\u1ec1 k\u00e9p ho\u1eb7c l\u00e0 20 khi t\u00ednh con \u0111\u1ec1 k\u00e9p xu\u1ea5t hi\u1ec7n 2 l\u1ea7n.<\/p>\n
V\u1edbi c\u00e1c c\u00e1ch ch\u01a1i kh\u00e1c nhau t\u1ef7 l\u1ec7 \u0103n s\u1ebd kh\u00e1c nhau. Do \u0111\u00f3 \u1edf c\u00e1c v\u00f9ng s\u1ebd c\u00f3 c\u00e1ch c\u00e1ch t\u00ednh b\u1eb1ng 1 khi tr\u00fang \u0111\u1ec1. N\u1ebfu nh\u01b0 tr\u00fang v\u00e0o \u0111\u1ec1 k\u00e9p th\u00ec c\u00f3 th\u1ec3 t\u00ednh 1 l\u1ea7n t\u01b0\u01a1ng t\u1ef1 nh\u01b0 c\u00e1c con \u0111\u1ec1 kh\u00e1c \u1edf c\u00e1ch t\u00ednh 19. N\u1ebfu nh\u01b0 c\u00e1ch t\u00ednh l\u00e0 20 con s\u1ed1 th\u00ec \u0111\u1ec1 v\u1ec1 con s\u1ed1 k\u00e9p th\u00ec \u0111\u01b0\u1ee3c t\u00ednh l\u00e0 2 l\u1ea7n tr\u00fang ti\u1ec1n v\u00e0 \u0111\u01b0\u1ee3c \u0103n g\u1ea5p 2 l\u1ea7n.<\/p>\n
D\u00e0n \u0111\u1ec1 ch\u1ea1m l\u00e0 m\u1ed9t trong nh\u1eefng ki\u1ec3u ch\u01a1i kh\u00e1 th\u00fa v\u1ecb v\u00e0 c\u00f3 t\u00ednh kh\u1ea3 thi cao. Ng\u01b0\u1eddi ch\u01a1i ch\u1ec9 c\u1ea7n l\u1eafm r\u00f5 \u0111\u01b0\u1ee3c b\u1ea3n ch\u1ea5t l\u00e0 c\u00f3 th\u1ec3 ch\u1ecdn l\u1ef1a ch\u01a1i theo c\u00e1ch n\u00e0y hi\u1ec7u qu\u1ea3 nh\u1ea5t. N\u1ed9i dung b\u00e0i vi\u1ebft \u0110\u1ec1 ch\u1ea1m l\u00e0 g\u00ec? C\u00e1c lo\u1ea1i \u0111\u1ec1 ch\u1ea1m c\u01a1 b\u1ea3n g\u1ed3m nh\u1eefng […]<\/p>\n","protected":false},"author":1,"featured_media":18427,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[314],"tags":[3721,3718,3515,3726,3731,3512,3519,3733,3725,3724,3727,3722,3723,3735,3729,3740,3737,3734,3743,3741,3738,3742,3739,3728,3732,3720,3717,3736,3730,3719],"yoast_head":"\n