All numbers divisible by both 3 and 8 are also divisible by which one of the following numbers？

A. 5
B. 6
C. 9
D. 21
E. 38

Rectangle PQRS lies in the xy-coordinate plane so that its sides are not parallel to the axes. What is the product of the slopes of all four Sides of rectangle PQRS？

A. -2
B. -1
C. 0
D. 1
E. 2

A colored marble is to be chosen at random from a bag of marbles. The probability that the

A. 36
B. 64
C. 72
D. 81
E. 108

In 1970, if the cost to produce one widget was $0.07, what would have been the total cost

A. $1,540
B. $14,000
C. $20,650
D. $22,750
E. $34,300

The percent decrease in average number of production hours per widget from 1990 to 2000 was approximately

A. 44%
B. 36%
C. 34%
D. 32%
E. 27%

If a square and an equilateral triangle have equal perimeters, what is the ratio of the area of the triangle to the area of the square？E．

On a number line, the distance between the two points with coordinates -5 and 1 is how much less than the distance between the two points with coordinates 2 and 14？

A. 6
B. 8
C. 10
D. 12
E. 16

Which of the following equations can be used to find the value of x if 7 less than 5x is 5

A. 5x-7 = 5 + 3x
B. 5x-7 = 5 + (3+x)
C. 7-5x = 5 + 3x
D. 7-5x=(5 + 3)x
E. 7-5x + 5 = 3x

City Y has installed 30 parking meters at 15-foot intervals along a straight street. What

A. 200
B. 420
C. 435
D. 450
E. 465

At College C there are from 2 to 4 introductory philosophy classes each semester, and each

A. 12
B. 10
C. 8
D. 6
E. 3