请教数学题一道…

michaelwu64

07 08 09 10 11
16 15 14 13 12
17 18 19 20 21
26 25 24 23 22
27 28 29 30 31

The figure above consists of 25 squares. If the figure were folded along the dotted diagonal to form a flat triangle, then 26 minus the number in the square that would coincide with the square containing 26 would be___

The dotted diagonal是从07经15，19，23至31。想请教各位的是：”…the number in the square that would coincide with the square containing 26”指的是不是10呢？因为没有答案，所以恼人的很？谢谢！

michaelwu64

Thanks,pgelt! I appreciate your help!

pgclt

应该是10吧。就是隔对角线对称的点，10或28。