请教大N们prep一道

lvgv · 发表于 2008-10-15 19:40:00

Is the integer n odd?

(1) n
is divisible by 3

(2) 2n is divisible by twice as many positive integers as n

条件2没有看明白

答案是B

不明白为什么选B

[此贴子已经被作者于2008-10-17 19:55:16编辑过]

xiaoy791 · 发表于 2008-10-15 22:43:00

意思是,2n的除数个数是n的除数个数的2倍,如5的除数是1,5,有2个;则10的除数为1,2,5,10,有4个

chenyuankare · 发表于 2008-10-16 15:31:00

whats the answer for this one?

lelalee · 发表于 2008-10-16 16:11:00

感觉是B吧

所属分类: GMAT考试