PREP MATH 问题，请高人指点

lynn_lin

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.
我选的A， 答案是D。
第2条，我是举例
p=2^2+ 1^2 = 5， REMINDER =1
p=3^2+ 1^2 = 10， REMINDER =2
所以2不成立啊


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.
ANSWER IS B.

57.  During a sale, for each shirt that Mark purchased at the regular price, he also purchased a shirt at half the regular price. How many shirts did Mark purchase during the sale?
(1) The regular price of each of the shirts that Mark purchased during the sale was $21.50.
(2) The total of the prices for all the shirts that Mark purchased during the sale was $129.00.
I FEEL IS E. eg: 2件全价买 + 8件半价买； 或者4件全价买 + 4件半价买，都能符合。

WHY ANSWER C?

xuseraph

1. P is an odd,  你的第二种情况不符合
2.4%学法语的人同时学习了日语，而B说16%的学日语的人学了法语，由此可知学法语的人数比学日语的多；
3.题目的意思是每买一件正价T，会买一件半价T所以有你说的4件全价买+4件半价符合

lynn_lin

1.3明白，TKS.
2没看懂，能否解释下。