2021 SPRING AMC12B 真题

2021Spring AMC12B

Problem 1

How many integer values of satisfy

Problem 2

At a math contest, students are wearing blue shirts, and another students are wearing yellow shirts. The students are assigned into pairs. In exactly of these pairs, both students are wearing blue shirts. In how many pairs are both students wearing yellow shirts?

在一次数学竞赛中， 57 名学生穿着蓝色衬衫，另外 75 名学生穿着黄色衬衫。 132 名学生被分 成了 66 对。这其中恰好有 23 对，每对的两名学生都穿着蓝色衬衫。问两名学生都穿着黄色 衬衫的对有多少个？

(A) 23 (B) 32 (C) 37 (D) 41 (E) 64

Problem 3