18.If two trains are 120 miles apart and are traveling toward each other at a constant rate of 30 mph and 40 mph, respectively, how far apart will they be exactly 1 hour before they meet?

　　A.10 miles

　　B.30 miles

　　C.40 miles

　　D.50 miles

　　E.70 miles

　　答案：E

　　19.On a highway there is an electric pole every 96 feet. If the poles are numbered consecutively, what is the number of the pole 2 miles past pole number 56?(1 mile=5,280feet)

　　A.109

　　B.110

　　C.152

　　D.165

　　E.166

　　答案：E

　　20.In a certain room, all except 18 of the people are over 50 years of age. If 15 of the people in the room are under 50 years of age, how many people are in the room?

　　A.27

　　B.30

　　C.33

　　D.36

　　E. It cannot be determined from the information given.

　　答案：E

　　21.Sixty-eight people are sitting in 20 cars and each car contains at most 4 people. What is the maximum possible number of cars that could contain exactly 1 of the 68 people?

　　A.2

　　B.3

　　C.4

　　D.8

　　E.12

　　答案：C

　　22.Art,Bob and Carmen share a prize of $400. If Art receives twice as much as Bob, and if Bob receives 1/2 as much as Carmen, how much does Carmen receive?

　　A.$20

　　B.$40

　　C.$80

　　D.$140

　　E.$160

　　答案：E