Digit Root (**)(math major people prohibited)

Digit root of a number is defined by summing its digits and then repeating the process (summing the sum's digits) until the answer is a single digit number. For example, the digit root of 7368 is 6.

Find the digit root of (9^7240+38)^8457

所有跟帖： 

• I just realize that I am not allowed to answer this question! -haha2000- ♂ (0 bytes) () 07/14/2006 postreply 12:00:12

• Sue me for discrimination? -Commentate- ♂ (0 bytes) () 07/14/2006 postreply 12:14:44

• 要律师吗？陪审团？法官？呵呵。。 -idiot94- ♂ (0 bytes) () 07/14/2006 postreply 12:20:09

• How do you know who is? -constant- ♀ (0 bytes) () 07/14/2006 postreply 12:26:50

• 这个容易，法官说，“会做的就是！” -idiot94- ♂ (0 bytes) () 07/14/2006 postreply 12:30:38

• Right, but I can't say constant, I94, haha2000,... are prohibite -Commentate- ♂ (0 bytes) () 07/14/2006 postreply 12:35:14

• 7 -trytosee- ♂ (24 bytes) () 07/14/2006 postreply 12:45:23

• You may need to redo your calculation! -haha2000- ♂ (0 bytes) () 07/14/2006 postreply 13:09:43

• 8 -trytosee- ♂ (0 bytes) () 07/14/2006 postreply 13:36:14

• correct. -Commentate- ♂ (0 bytes) () 07/14/2006 postreply 14:04:38

• 任意数的Dig-R等于该数除以9的余数。若余数为0, -pangjun- ♂ (205 bytes) () 07/15/2006 postreply 08:33:12