<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n
\u0110\u1ed1i v\u1edbi nh\u1eefng tay ch\u01a1i chuy\u00ean nghi\u1ec7p th\u00ec <\/span>c\u00e1ch b\u1eaft \u0111\u1ec1 ch\u1eb5n l\u1ebb ch\u1eb3ng c\u00f2n xa l\u1ea1. Th\u1ebf nh\u01b0ng v\u1edbi nh\u1eefng anh em m\u1edbi ch\u01a1i c\u00f3 l\u1ebd v\u1eabn c\u00f2n m\u01a1 h\u1ed3. Hi\u1ec3u \u0111\u01b0\u1ee3c \u0111i\u1ec1u \u0111\u00f3, b\u00e0i vi\u1ebft sau \u0111\u00e2y s\u1ebd \u0111\u1ec1 c\u1eadp v\u1ec1 \u0111\u1ebfn nh\u1eefng ki\u1ebfn th\u1ee9c c\u01a1 b\u1ea3n v\u1ec1 <\/span>c\u1ea7u \u0111\u1ec1 ch\u1eb5n l\u1ebb c\u0169ng nh\u01b0 h\u01b0\u1edbng d\u00e2\u0303n ca\u0301ch b\u0103\u0301t \u0111\u00ea\u0300 ch\u0103\u0303n le\u0309 \u0111a\u0301nh lu\u00f4n lu\u00f4n tru\u0301ng cho anh em m\u1edbi ch\u01a1i t\u00ecm hi\u1ec3u, v\u1eadn d\u1ee5ng v\u00e0 cho nh\u1eefng anh em ch\u01a1i l\u00e2u n\u0103m r\u1ed3i tham kh\u1ea3o.<\/span><\/p>\nGi\u01a1\u0301i thi\u00ea\u0323u v\u00ea\u0300 ca\u0301ch \u0111a\u0301nh \u0111\u00ea\u0300 ch\u0103\u0303n le\u0309<\/b><\/span><\/h2>\n\u0110\u1ec3 c\u00f3 th\u1ec3 v\u1eadn d\u1ee5ng t\u1ed1t b\u1ea5t k\u1ef3 m\u1ed9t ph\u01b0\u01a1ng ph\u00e1p n\u00e0o \u0111\u00f3 th\u00ec ch\u00fang ta c\u1ea7n hi\u1ec3u ph\u01b0\u01a1ng ph\u00e1p \u0111\u00f3 l\u00e0 g\u00ec? \u0110\u00fang nh\u01b0 c\u00e2u \u201cbi\u1ebft ng\u01b0\u1eddi bi\u1ebft ta tr\u0103m tr\u1eadn tr\u0103m th\u1eafng\u201d. \u0110\u1ed1i v\u1edbi <\/span>c\u00e1ch b\u1eaft \u0111\u1ec1 ch\u1eb5n l\u1ebb <\/b>c\u0169ng kh\u00f4ng ngo\u1ea1i l\u1ec7. Trong b\u00e0i vi\u1ebft n\u00e0y, \u0111\u1ea7u ti\u00ean m\u00ecnh s\u1ebd c\u00f9ng anh em t\u00ecm hi\u1ec3u xem c\u1ea7u ch\u1eb5n l\u1ebb l\u00e0 g\u00ec?<\/span><\/p>\nKhi nghe qua c\u1ea7u ch\u1eb5n l\u1ebd c\u00f3 l\u1ebd anh em c\u0169ng \u0111\u00e3 h\u00ecnh dung ra ch\u1eafc ch\u1eafn con s\u1ed1 \u0111\u00f3 s\u1ebd c\u00f3 s\u1ed1 ch\u1eb5n ho\u1eb7c s\u1ed1 l\u1ebb. Chu\u1ea9n x\u00e1c! <\/span>C\u1ea7u ch\u1eb5n l\u1ebb l\u00e0 t\u00ean g\u1ecdi m\u1ed9t c\u1ea7u g\u1ed3m 2 s\u1ed1 \u0111\u01b0\u1ee3c c\u1ea5u t\u1ea1o b\u1edfi c\u00e1c s\u1ed1 ch\u1eb5n hay s\u1ed1 l\u1ebb. L\u1eadt l\u1ea1i ki\u1ebfn th\u1ee9c To\u00e1n h\u1ed3i ti\u1ec3u h\u1ecdc ch\u00fat nh\u00e9! C\u00e1ch nh\u1eadn bi\u1ebft s\u1ed1 ch\u1eb5n v\u00e0 s\u1ed1 l\u1ebb l\u00e0 ch\u00fang ta ki\u1ec3m tra xem s\u1ed1 \u0111\u00f3 c\u00f3 chia h\u1ebft cho 2 hay kh\u00f4ng. C\u0103n c\u1ee9 v\u00e0o \u0111\u00f3 th\u00ec c\u00e1c s\u1ed1 ch\u1eb5n s\u1ebd l\u00e0 0, 2, 4, 6, 8 v\u00e0 s\u1ed1 l\u1ebb l\u00e0 1, 3, 5, 7, 9.<\/span><\/p>\nSau khi \u0111\u00e3 t\u00ecm hi\u1ec3u qua c\u1ea7u ch\u1eb5n l\u1ebb l\u00e0 g\u00ec? Ch\u00fang ta s\u1ebd c\u00f9ng nhau chuy\u1ec3n sang t\u00ecm hi\u1ec3u c\u00e1c d\u1ea1ng <\/span>c\u1ea7u \u0111\u1ec1 ch\u1eb5n l\u1ebb <\/b>th\u01b0\u1eddng g\u1eb7p.<\/span> D\u1ea1ng c\u1ea7u n\u00e0y th\u01b0\u1eddng c\u00f3 3 lo\u1ea1i \u0111\u01b0\u1ee3c chia theo c\u1ea5u t\u1ea1o c\u00e1c s\u1ed1 trong c\u1eb7p. C\u1ee5 th\u1ec3: <\/span><\/p>\nDa\u0300n \u0111\u00ea\u0300 ch\u0103\u0303n le\u0309<\/i><\/b><\/span><\/h3>\nD\u1ea1ng \u0111\u1ea7u ti\u00ean c\u1ee7a <\/span>c\u00e1ch b\u1eaft \u0111\u1ec1 ch\u1eb5n l\u1ebb <\/b>l\u00e0 d\u1ea1ng ch\u1eb5n \u2013 l\u1ebb. T\u1ee9c l\u00e0 trong c\u1eb7p s\u1ed1 \u0111\u00f3 s\u1ebd ch\u01b0a \u0111\u1ef1ng 1 s\u1ed1 ch\u1eb5n v\u00e0 1 s\u1ed1 l\u1ebb gh\u00e9p l\u1ea1i v\u1edbi nhau. S\u1ed1 ch\u1eb5n \u0111\u1ee9ng tr\u01b0\u1edbc s\u1ed1 l\u1ebb \u0111\u1ee9ng sau<\/span><\/p>\nV\u00ed d\u1ee5: 81, 23, 47, 63,\u2026<\/span><\/p>\n