yes, 9,2,2 is right answer, but not because of their sum is 13.
The mother said: 說了對你也沒有幫助. This means you need first find out those answers their sum are same, and you can find that 6,1,1 and 9,2,2 are the only ones,...
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早想到了, 沒敢說, 因為雙胞胎也有大有小啊!
-倪達業-
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09/21/2009 postreply
11:28:50
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根據出蹄比有鞋定理, 否則就真沒解了.
-風箏--
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09/21/2009 postreply
11:59:11