{"id":18125,"date":"2024-05-04T01:48:31","date_gmt":"2024-05-04T01:48:31","guid":{"rendered":"https:\/\/soicau5018.minhngocxoso.com\/?p=18125"},"modified":"2024-05-04T01:48:31","modified_gmt":"2024-05-04T01:48:31","slug":"kham-pha-cach-choi-dan-de-khong-chia-het-cho-3","status":"publish","type":"post","link":"https:\/\/soicaumienbac8.com\/kham-pha-cach-choi-dan-de-khong-chia-het-cho-3\/","title":{"rendered":"kh\u00e1m ph\u00e1 c\u00e1ch ch\u01a1i d\u00e0n \u0111\u1ec1 kh\u00f4ng chia h\u1ebft cho 3"},"content":{"rendered":"\n
D\u00e0n \u0111\u1ec1 l\u00e0 m\u1ed9t trong nh\u1eefng c\u00e1ch ch\u01a1i l\u00f4 \u0111\u1ec1 \u0111\u01b0\u1ee3c nhi\u1ec1u ng\u01b0\u1eddi \u00e1p d\u1ee5ng v\u00e0 l\u1ef1a ch\u1ecdn. Trong \u0111\u00f3 d\u00e0n \u0111\u1ec1 kh\u00f4ng chia h\u1ebft cho 3 l\u00e0 m\u1ed9t trong nh\u1eefng d\u1ea1ng d\u00e0n \u0111\u01b0\u1ee3c t\u00ecm ki\u1ebfm r\u1ea5t nhi\u1ec1u. \u0110\u1ec3 c\u00f3 \u0111\u01b0\u1ee3c nh\u1eefng con s\u1ed1 may m\u1eafn khi ch\u01a1i b\u1ea1n c\u1ea7n n\u1eafm \u0111\u01b0\u1ee3c nh\u1eefng th\u00f4ng tin c\u01a1 b\u1ea3n v\u1ec1 c\u00e1ch t\u1ea1o d\u00e0n \u0111\u1ec1. B\u00e0i vi\u1ebft d\u01b0\u1edbi \u0111\u00e2y s\u1ebd gi\u00fap b\u1ea1n c\u00f3 \u0111\u01b0\u1ee3c nh\u1eefng \u0111i\u1ec1u b\u1ed5 \u00edch.<\/p>\n\n\n\n
D\u00e0n \u0111\u1ec1 kh\u00f4ng chia h\u1ebft cho 3 n\u1eb1m trong b\u1ed9 t\u1eeb 00 \u0111\u1ebfn 99. Tuy nhi\u00ean ch\u00fang ph\u1ea3i th\u1ecfa m\u00e3n \u0111\u01b0\u1ee3c \u0111i\u1ec1u ki\u1ec7n l\u00e0 kh\u00f4ng chia h\u1ebft cho 3. V\u00ed d\u1ee5 nh\u01b0 s\u1ed1 47 kh\u00f4ng chia h\u1ebft cho 3 th\u00ec s\u1ebd n\u1eb1m trong d\u00e0n \u0111\u1ec1 n\u00e0y. Nh\u01b0ng trong d\u00e0n \u0111\u1ec1 \u0111\u00f3 s\u1ebd \u0111\u01b0\u1ee3c t\u1ed5ng h\u1ee3p v\u00e0 ph\u00e2n chia th\u00e0nh hai d\u1ea1ng kh\u00e1c nhau. \u0110\u00f3 l\u00e0 kh\u00f4ng chia h\u1ebft cho 3 d\u01b0 1 v\u00e0 kh\u00f4ng chia h\u1ebft cho 3 d\u01b0 2.<\/p>\n\n\n\n
Ng\u01b0\u1eddi ch\u01a1i c\u00f3 th\u1ec3 d\u1ec5 d\u00e0ng t\u00ecm ra \u0111\u01b0\u1ee3c d\u00e0n \u0111\u1ec1 kh\u00f4ng chia h\u1ebft cho 3. V\u1edbi c\u00e1ch t\u00ednh t\u1ed5ng c\u1ee7a hai \u0111\u00f3 l\u1ea1i, n\u1ebfu t\u1ed5ng c\u1ee7a ch\u00fang kh\u00f4ng chia h\u1ebft cho 3 th\u00ec s\u1ebd thu\u1ed9c d\u00e0n \u0111\u1ec1 n\u00e0y.<\/p>\n\n\n\n
V\u00ed d\u1ee5:<\/p>\n\n\n\n
D\u00e0n \u0111\u1ec1 kh\u00f4ng chia h\u1ebft cho 3 th\u1ef1c t\u1ebf l\u00e0 g\u1ed3m t\u1ea5t c\u1ea3 nh\u1eefng s\u1ed1 t\u1eeb 00 – 99. Nh\u01b0ng c\u00f3 \u0111i\u1ec3m chung l\u00e0 kh\u00f4ng chia h\u1ebft cho 3. Trong b\u00e0i n\u00e0y ch\u00fang t\u00f4i ch\u1ec9 gi\u1edbi thi\u1ec7u d\u00e0n 33 s\u1ed1 nh\u01b0ng hi\u1ec7n nay c\u00f3 r\u1ea5t nhi\u1ec1u. Th\u00eam v\u00e0o \u0111\u00f3 d\u00e0n \u0111\u1ec1 n\u00e0y \u0111\u01b0\u1ee3c chia th\u00e0nh 2 lo\u1ea1i kh\u00e1c nhau. \u0110\u00f3 l\u00e0 chia cho 3 d\u01b0 1 v\u00e0 chia cho 3 d\u01b0 2. C\u1ee5 th\u1ec3:<\/p>\n\n\n\n
L\u1ea5y v\u00ed d\u1ee5 c\u1ee5 th\u1ec3 nh\u01b0 sau:<\/p>\n\n\n\n