请教prepgmat 几道数学题

49hibbert

1。if (1/5)^m * (1/4)^18 = 1/2(10)^35, then m= ?

17, 18, 34, 35 36

the answer is 35

幂的运算忘记了，不会做，请教一下，谢谢

2 of the stuends who eat in a certain cafeteria, each student either likes or dislikes lima beans and each student either likes or dislikes brussels sprouts. of these students, 2/3 dislike lima beans; and of those who dislike lima beans, 3/5 also dislike brussels sprouts. how many of the students like brussels sprouts but dislike lima beans?

1)120 students eat in the cafteria

2) 40 of the sutendts like lima beans.

the answer is D, why?

thank you

[此贴子已经被作者于2006-8-27 4:54:11编辑过]

49hibbert

哦，明白了，谢谢你muzli113，能在帮着看一下第２个问题吗？