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GWD20-36

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GWD20-36

由 adamela » 2007-02-05 00:37

If a and b are positive integers such that (a-b) and a/b are both even integers, which of the following must be an odd integer?

A. a/2
B. b/2
C. (a+b)/2
D. (a+2)/2
E. (b+2)/2

Answer：D

I can't figure out how to answer it!
Who can explain it?
TKS!

adamela: 新手會員; 帖子: 3; 注册: 2006-02-03 10:19

由 fsab00037748 » 2007-02-13 22:18

http://www.formosamba.com/phpBB3/viewtopi ... 2Bb%29%2F2

之前有討論過, 請參考

fsab00037748: 中級會員; 帖子: 156; 注册: 2006-02-17 13:30

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