8. n and m are positive integers, what is the remainder when 3^(4n + 2 + m) is divided by 10 ?
（1）n = 2
（2）m = 1
这题选B
11.If p is a positive odd integer, what is the remainder when p is divided by 4 ?
(1) When p is divided by 8, the remainder is 5.
(2) p is the sum of the squares of two positive integers.
选D
35. If p and n are positive integers and p > n, what is the remainder when p2 - n2 is divided by 15 ?
(1) The remainder when p + n is divided by 5 is 1.
The remainder when p - n is divided by 3 is 1.
选E
还有下面这道题为何不选D..而要选C。。
49Does x + y = 5 ?
(1) 4x + y = 17
（2）x + 4y = 8
选C
23. At least 100 students at a certain high school study Japanese. If 4 percent of the students at the school who study French also study Japanese, do more students at the school study French than Japanese?
(1) 16 students at the school study both French and Japanese
. (2) 10 percent of the students at the school who study Japanese also study French.
