2018年AMC12真题PDF下载-B卷
1.Kate bakes 20-inch by 18-inch pan of cornbread. The cornbread is cut into pieces that measure 2 inches by 2 inches. How many pieces of cornbread does the pan contain?
A.90
B.100
C.180
D.200
E.360
2.Sam drove 96 miles in 90 minutes. His average speed during the first 30 minutes was 60 mph (miles per hour), and his average speed during the second 30 minutes was 65 mph. What was his average speed, in mph, during the last 30 minutes?
A.64
B.65
C.66
D.67
E.68
3.A line with slope 2 intersects a line with slope 6 at the point (40,30).what is the distance between the x-intercepts of these two lines?
A.5
B.10
C.20
D.25
E.50
4.A circle has a chord of length 10, and the distance from the center of the circle to the chord is 5. What is the area of the circle?
A.25π
B.50π
C.75π
D.100π
E.125π
5.How many subsets of {2,3,4,5,6,7,8,9}contain at least one prime number?
A.128
B.192
C.224
D.240
E.256
6.Suppose S cans of soda can be purchased from a vending machine for Q quarters. Which of the following expressions describes the number of cans of soda that can be purchased for D dollars, where 1 dollar is worth 4 quarters?
A.4DQ/S
B.4DS/Q
C.4Q/DS
D.DQ/4S
E.DS/4Q
7.What is the value of log37.log59.log711.log913.......log2125.log2327?
A.3
B.3log723
C.6
D.9
E.10
余下真题省略！
你可能还关注