高中数学题：求和

The numbers 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14 and 15 are arranged to form a 5 × 3 table

in each of the 15! possible ways. For each table, we compute the sum of the three numbers in

each row, and record in a list the largest and the smallest of these sums. Determine the sum of the

2×15! numbers on our list.

所有跟帖： 

• 48X15! -wxcfan123- ♂ (280 bytes) () 01/04/2014 postreply 12:21:55

• 正确，思路很妙，多谢！ -万斤油- ♂ (0 bytes) () 01/04/2014 postreply 19:21:53