I have 5 pennies, 4 nickels, 3 quarters, 2 half-dollars, and 1 dollar. The average value of one of my coins is ( )

A) $0.20    B) $0.60    C) $1.50   D) $3.00

参考答案：A

解析：penny相当于cent，一美分；nickle五美分；quarter25美分；half一半，half-dollar50美分，average平均；value值。

A man had five pieces of chain, each made up of three links, figure below. He wanted to join the five pieces together to make a big chain of fifteen links and went to a black smith to see how much it would cost. “Well”, said the blacksmith, “I will charge you 50 cents for cutting a link and $1.00 for welding a link. Any bending that is required is free.” Given those prices, what is the smallest amount of money for which the job could be done?

A)  $4.5   B) $5.00    C)$5.50    D)$6.00   

参考答案：A

解析：一个人有五块链条，每个链条上有三节，现在要把这五块链条连接成一条15节的长链条，切开需要0.5美元，焊上需要1美元，其他必要劳务免费，问最少需要多少钱？本题需要思考最少切开几节链条就可以把所有的都连接起来，答案是把原来的一条三节链条全部切开，用来连接剩余的四条链条，因此，答案为4.5美元。

When I split the cost of a video game equally with 4 friends, we each pay $12. How much more do each of us pay if I split the cost equally with only 3 friends?

A. $3.00      B. $4.00      C. $15.00      D. $16.00

参考答案：A。

【解析】需要注意两点，一是人数总和需要加上自身；二是how much more 中more，求的是四个人分比五个人分每个人多负担多少钱。因此，本题应为12×5÷4-12=3

注：题目均选自历年真题