2015 AMC10B 真题

Problem 1

What is the value of ?

Problem 2

Marie does three equally time-consuming tasks in a row without taking breaks. She begins the first task at 1:00 PM and finishes the second task at 2:40 PM. When does she finish the third task?

Marie 连续做了 项耗时相同的任务，中间没有休息。她从下午 3 1:00 开始做第一个任务，在 下午 2:40 完成第二个任务。她何时完成第三个任务 ?

(A) 3.10 PM (B) 3.30 PM (C) 4:00 PM (D) 4:10 PM (E) 4:30 PM

Problem 3

Isaac has written down one integer two times and another integer three times. The sum of the five numbers is , and one of the numbers is . What is the other number?

Isaac 把一个整数写了 2 遍，另一个整数写了 3 遍，这 5 个数之和为 100. 其中一个数是 28 ，另 一个数是多少？

(A) 8 (B) 11 (C) 14 (D) 15 (E) 18

2015 AMC 10B