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标题: GWD 13-10 [打印本页]

作者: bloomingdales 时间: 2007-3-13 11:48 标题: GWD 13-10

Q10: If x and y are positive integers, what is the value of x? (1) 3x5y = 1,125 (2) y = 3 A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient. B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient. C. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient. D. EACH statement ALONE is sufficient. E. Statements (1) and (2) TOGETHER are NOT sufficient.

Key: A

I pick C

作者: strawdog 时间: 2007-3-13 14:21

from statement 1, we can get x=2 and y=3. Thus A is the right answer.

作者: bastencools 时间: 2007-3-14 18:48

应该是C吧，这道题怎么可能是A？？

作者: xiaojinqiong 时间: 2007-3-15 12:36

我认为是这个题目抄错了,正确的条件(1)应该是3^X * 5^Y=1,125

因为3^2 * 5^3=1125,所以X=2, Y=3. 所以A直接可得答案.

作者: bloomingdales 时间: 2007-3-17 21:06

thanks, I got it   !!!!!!!!!!!!!!!!

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