1. Quantity A: x
A. Quantity A is greater.
B. Quantity B is greater.
D. The relationship cannot be determined from the information given.
答案：D
2. Jim exercised last Monday at 6:00 in the evening and then exercised every thrid day after that. For example, after last Monday, he exercised the following Thursday and then the Sunday following that. How many days after last Monday will be the next Monday he exercises?
答案：21
3. The population of Country X for 1980 was p. The population of Country X increased by 3.8 percent in each of the next two years.
Quantity A: The population of Country X for 1982.
A. Quantity A is greater.
B. Quantity B is greater.
D. The relationship cannot be determined from the information given.
答案：A
4. If x < y, which of the following must be true?
A. 2x < y
C. x^2 < y^2
D. 2x-y < y
答案：D
解析：D项可变形为2x < 2y, 即题干的x < y, 是唯一正确解，其它等式缺乏条件，无法成立。
Quantity A: 2r
Quantity B: 1/r
B. Quantity B is greater.
C. The two quantities are equal.
答案：D
解析：如果r=2/3, 则A=4/3 B=1.5, AB。因此存在不同结果无法判断，所以选D。