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标题: TT GWD-21-25 [打印本页]

作者: aliciafull 时间: 2008-2-29 21:28
标题: TT GWD-21-25

Q25:

If M is
the least common multiple of 90, 196, and 300, which of the following is NOT a
factor of M ?

A. 600

B. 700

C. 900

D. 2,100

E. 4,900

这种题怎么做呀，请说一下思路，谢谢~

作者: aliciafull 时间: 2008-3-1 22:07
顶

作者: diane320 时间: 2008-3-3 18:24
M=2*2*3*3*5*5*7*7=3*3*7*7*100
所以A不行吧

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