1) Each of the 45 boxes on shelf J weights less than each of the 44 boxes on shelf K. What's the median weight of the 89 boxes on these shelves?
a) The heaviest box on shelf J weights 15 pounds
b) the lightest box on shelf K weights 20 pounds
答案是只要单独a)，即可推出89个盒子的median weight。为什么哦？
2) If s is the product of integers from 110 to 200, inclusive, and t is the product of the integers from 100 to 201, inclusive, what's 1/s+1/t, in terms of t?
a) (201)2/t b) [(202)(201)]/t c) 201/t d) 202/t e)[(202)(201)]/t2
这个怎么做啊？不懂思路
3) Last year the price per share of stock X increased by K percent and the earnings per share of stock X increased by M percent. While K is greater than M. By what percent did the ratio of price per share to earnings per share increase, in terms of K and M?
a) K/M% b) (K-M)% c) [100(K-M)]/(100+K)% d) [100(K-M)]/(100+M)%
e) [100(K-M)]/(100+K+M)%
