2018 AMC10B 真题

2018 AMC 10B

Problem 1

Kate bakes a -inch by -inch pan of cornbread. The cornbread is cut into pieces that measure inches by inches. How many pieces of cornbread does the pan contain?

Kate 烤了一块 20 英寸 x 18 英寸的玉米面包。这块玉米面包被切分成 2 英寸 x 2 英寸的多个 小块面包。问这大块玉米面包包含多少块小块面包？

(A) 90 (B) 100 (C) 180 (D) 200 (E) 360

Problem 2

Sam drove miles in minutes. His average speed during the first minutes was mph (miles per hour), and his average speed during the second minutes was mph. What was his average speed, in mph, during the last minutes?

Sam 90 分钟内开了 96 英里。他在前 30 分钟内的平均速度为 60 英里每小时，在第二个 30 分 钟内的平均速度为 65 英里每小时。则他在最后 30 分钟内的平均速度是多少英里每小时 ?

(A) 64 (B) 65 (C) 66 (D) 67 (E) 68

Problem 3

(A) 2 (B) 3 (C) 4 (D) 6 (E) 24 In the expression each blank is to be filled in with one of the digits or with each digit being used once. How many different values can be obtained? 在表达式 中，从 ， ， 或 1 2 3 4 中选 1 个数字填到其中 1 个空 白处，并且每个数字只能使用 1 次。可以得到多少种不同的值 ?