Tin in t Dy l chn 20 s: 02, 04, 12, 14, 18, 20, 22, 24, 28, 32, 36, 44, 50, 52, 54, 68, 62, 72, 74 v¨¤ 80. Cui c¨´ng l¨¤ vic kt hp tt c c¨¢c c¨¢ch li vi nhau cng th¨ºm ch¨²t ¨ªt may mn na. Chc chn rng, vi nhng hng chn lc n¨¤y, bc th s nhanh ch¨®ng gi¨¤nh c chin thng v¨¤ thu v li nhun ln. K¨¨o 1 tr¨¢i ri 2 tr¨¢i (1.75): i ca tr¨ºn thng na tin nu thng c¨¢ch bit 2 b¨¤n, thng c¨¢ch bit 3 b¨¤n s n c tin cc. Nu kt qu thng c¨¢ch bit 1 b¨¤n, tt c cc t s b hy. B¨¤n b¨®ng b¨¤n l¨¤ thit b quan trng trong thi u, c quy nh vi c¨¢c thng s k thut cht ch: C¨¢ch xem k¨¨o pht g¨®c to¨¤n trn u ly-do-can-xem-mau-da-ga-tien-lon T¨®m tt ni dung S dng chin thut gi c¨¢c l¨¢ b¨¤i mnh n thi im th¨ªch hp Hng dn chia b¨¤i trong tr¨° chi b¨¤i tn u i hp dn Khi cm t qu m¨¤ ngi chi b v ch¨®t th¨¬ cn n tin cho c s¨°ng. C th, vi s tin cc 50 im th¨¬ n th¨ºm 50 x 3 t = 150 im. Nh vy, tin l¨ºn c¨°n th¨² v ch ngi chi c n tin khi ngi kh¨¢c thi b¨¤i p.

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