GMAT迷你测试上的一个数学题~

rebeccatj

8. Can the positive integer p be expressed as the product of two integers, each of which is greater than 1?

(1) 31 < p < 37

(2) p is odd

(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提交Incorrect Answer.

The Correct Answer was:
(A) Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
做的那个迷你GAMT，我觉得应该选E啊？第一个有多高答案的嘛，33.35.36都可以啊~麻烦各位了~

Jaycandoit

答案是A没错，因为题目问的是p能不能被factor成两个大于1的正整数乘积，而不是问你p是几，如果问p是多少，选E；但是问能不能，就是选A
因为在31和37之间的偶数都可以factor成2*k的形式
分析奇数就行：33=3*11，35=5*7，所以31和37之间的正整数都能factor成两个大于1的正整数的product，所以答案是p能，选A

rebeccatj

哦，呵呵，原来是问可不可以哈，我想当然地认为是求值~呵呵，谢谢你哦！