Funny Opration

來源: 於 2010-04-15 08:32:23 [舊帖] [給我悄悄話] 本文已被閱讀：次
80% ZT:
If N=987605,then A=9+8+7+6+0+5=39, B=3+9=12 and C=1+2=3,D=3,....
Question: N=2010!, Find C.