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,...
回複:第一題答案
所有跟帖:
• 早想到了, 沒敢說, 因為雙胞胎也有大有小啊! -倪達業- ♂ (0 bytes) () 09/21/2009 postreply 11:28:50
• 根據出蹄比有鞋定理, 否則就真沒解了. -風箏-- ♂ (0 bytes) () 09/21/2009 postreply 11:59:11