1985 AMC 12 第 4 题
先试着解答 1985 AMC 12 第 4 题，然后核对你的答案与精心整理的解答，解答来自 LIVE by Po-Shen Loh。你也可以参加完整限时模拟考试、查看全部 1985 AMC 12 解答，或核对答案。
所有题目均经美国数学协会（MAA）官方合法授权使用。
4.
一个大袋子里装有一美分、十美分和二十五美分硬币。十美分硬币的数量是一美分硬币的两倍，二十五美分硬币的数量是十美分硬币的三倍。袋中可能装有的钱数是
A large bag of coins contains pennies, dimes and quarters. There are twice as many dimes as pennies and three times as many quarters as dimes. An amount of money which could be in the bag is
小提示：
设一美分硬币的数量为
Let the number of pennies be
大提示：
用 的倍数表示硬币总价值（单位：美分）
Express the total value in cents as a multiple of
解答：
若有 枚一美分硬币，则有 枚十美分硬币和 枚二十五美分硬币。总价值为 美分。所列美元数中， 美分是可能的。
所以正确答案是 C。
If there are pennies, there are dimes and quarters. Their total value is cents. Of the listed dollar amounts, cents is possible.
Thus the correct answer is C.
其他年份的第 4 题
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