Nh\u1eefng th\u1ee7 thu\u1eadt l\u00f4 k\u00e9p \u0111\u01a1n gi\u1ea3n<\/em><\/figcaption><\/figure>\n– Soi l\u00f4 k\u00e9p \u1edf gi\u1ea3i \u0111\u1eb7t bi\u1ec7t.<\/span><\/p>\nN\u1ebfu gi\u1ea3i \u0111\u1eb7c bi\u1ec7t c\u00f3 hai ch\u1eef s\u1ed1 li\u1ec1n nhau th\u00ec b\u00e1o hi\u1ec7u s\u1eafp c\u00f3 l\u00f4 k\u00e9p v\u1ec1 v\u00e0 h\u00e3y note l\u1ea1i \u0111\u1ec3 nu\u00f4i l\u00f4 k\u00e9p \u1ea5y trong v\u00f2ng 3 ng\u00e0y nh\u00e9.<\/span><\/p>\nTh\u00ed d\u1ee5: Gi\u1ea3i \u0111\u1eb7c bi\u1ec7t v\u1ec1 05537. Ta th\u1ea5y c\u00f3 55 g\u1ea7n nhau. Th\u00ec nu\u00f4i l\u00f4 k\u00e9p con s\u1ed1\u00a0 55 trong v\u00f2ng 3 ng\u00e0y nh\u00e9. Nh\u1edb nu\u00f4i tr\u00ean nh\u00e0 c\u00e1i KUBET v\u00e0 v\u00e0o l\u00f4 \u0111\u1ec1 online \u0111\u1ec3 \u0111\u00e1nh. V\u1eeba an to\u00e0n, tr\u1ea3 th\u01b0\u1edfng nhanh ch\u00f3ng l\u1ea1i v\u1eeba \u0111\u01b0\u1ee3c h\u01b0\u1edfng t\u1ef7 l\u1ec7 ti\u1ec1n c\u1ea7u cao ch\u00f3t v\u00f3t.<\/span><\/p>\n– Soi l\u00f4 k\u00e9p \u1edf gi\u1ea3i 7.<\/span><\/p>\nTrong gi\u1ea3i 7 m\u00e0 c\u00f3 \u0111\u1ea7u v\u00e0 \u0111u\u00f4i c\u00f9ng nhau th\u00ec kh\u1ea3 n\u0103ng cao l\u00e0 l\u00f4 k\u00e9p s\u1ebd v\u1ec1 \u0111\u1ea5y.<\/span><\/p>\nTh\u00ed d\u1ee5, gi\u1ea3i 7 v\u1ec1 4 c\u1eb7p s\u1ed1: 41, 17, 35, 52. Quan s\u00e1t th\u1ea5y c\u00f3 \u0111u\u00f4i 1 \u1edf con 41 v\u00e0 \u0111\u1ea7u 1 \u1edf con 17. Nh\u01b0 v\u1eady kh\u1ea3 n\u0103ng c\u1ef1c cao v\u1ec1 k\u00e9p ng\u00e0y h\u00f4m sau l\u00e0 con 11.<\/span><\/p>\nSoi \u0111\u1ec1 l\u00f4 xi\u00ean\u00a0<\/i><\/h3>\n
L\u00f4 xi\u00ean m\u00e0 \u0111\u01b0\u1ee3c ng\u01b0\u1eddi ch\u01a1i ch\u00fa tr\u1ecdng nh\u1ea5t l\u00e0 l\u00f4 xi\u00ean 2, xi\u00ean 3 v\u00e0 xi\u00ean 4. N\u00f3 l\u00e0 m\u1ed9t nh\u00f3m c\u00e1c con s\u1ed1 t\u00e1ch r\u1eddi nhau. N\u1ebfu trong b\u1ea3ng x\u1ed5 s\u1ed1 mi\u1ec1n B\u1eafc v\u1ec1 \u0111\u01b0\u1ee3c \u0111\u1ee7 2, 3, 4 s\u1ed1 m\u00e0 b\u1ea1n l\u1ef1a ch\u1ecdn th\u00ec b\u1ea1n s\u1ebd \u0111\u01b0\u1ee3c tr\u00fang c\u1ea7u xi\u00ean \u0111\u00f3. V\u00e0 ch\u1eafc ch\u1eafn t\u1ef7 l\u1ec7 \u0103n c\u1ee7a n\u00f3 cao h\u01a1n so v\u1edbi l\u00f4 b\u1ea1ch th\u1ee7.<\/span><\/p>\nC\u00f3 \u0111a d\u1ea1ng c\u00e1ch \u0111\u1ec3 ch\u1ecdn l\u00f4 xi\u00ean. Nh\u01b0ng c\u00e1ch t\u1ed1t nh\u1ea5t \u0111\u1ec3 \u0111\u1ecdc v\u1ecb c\u1ea7u n\u00e0y l\u00e0 ch\u1ecdn nh\u1eefng c\u1eb7p s\u1ed1 th\u01b0\u1eddng ra c\u00f9ng v\u1edbi nhau. Ho\u1eb7c k\u1ebft h\u1ee3p gi\u1eefa l\u00f4 b\u1ea1ch th\u1ee7 v\u00e0 l\u00f4 k\u00e9p, c\u1eb7p ra c\u00f9ng nhau v\u1edbi b\u1ea1ch th\u1ee7\u2026<\/span><\/p>\n