1、Two numbers differ by（与…相差 ）57. Their sum is 185. Find the
numbers.
2、A bus went 318 km farther than a car. The car went one third （三分之
一） as far as the bus. How far did each vehicle（车辆） travel?
3、one number is four times another number. The larger number is also 87
more than the smaller number. Find the numbers.
4、A clown（小丑） weights 60 lb（磅） more than a trapeze artist.（荡秋千
演员）。 The trapeze artist weighs two thirds（三分之二）as much as the
clown. How much does each weigh?
5、The U.S. Senate has 100 memebers, all
Democrats or Republicans.
Recently there were 12 more Democrats than Republicans. How many
Senators from each political party were there at that time?
6.The ninth grade class has 17 more girls than boys. there are 431 students in
all. how many boys are there? how many girls are there?
7. Elena has one and a half times as much money as Ramon.Together they
have 225. how much money does each have?
8、Western state college is 18 years older than southern state. western is
also 2 and the half times as old as southern. how old is each?
9、The alarm of Clock A rings every 4 minutes, the alarm of Clock B rings every 6
minutes, and the alarm of Clock C rings every 7 minutes. If the alarms of all three
clocks ring at 12:00 noon, the next time at which all the alarms will ring at exactly
the same time is （ ）
A. 12:28 P.M. B. 12:56 P.M. C. 1:24 P.M. D. 1:36 P.M.
10、On 5 math tests, Gloria had an average score of 86. If all test scores are integers,
what is the lowest average score average score Gloria can receive on the remaining
3 tests if she wants to finish the semester with an average score of 90 or higher?
A.、90 B、 92 C、94 D、96 E、97
11、Two boys, Dudi and Gani, run back and forth between two points A and
B at a constant（恒定的） speed without stopping. Dudi's speed is 1.5
times Gani's speed. Dudi runs from A to B while Gani from B to A. They
both start at the same time. The two boys meet for the first time at 800
meters away from B. How far are the boys from A when they meet for the
second time?