标题: 求问一道难题册的数学 [打印本页] 作者: 沃卜植稻 时间: 2020-1-4 14:38 标题: 求问一道难题册的数学 Merle’s spare change jar has exactly 16 U.S. coins, each of which is a 1-cent coin, a 5-cent coin, a 10-cent coin, a 25-cent coin, or a 50-cent coin. If the total value of the coins in the jar is 288 U.S. cents, how many 1-cent coins are in the jar?
The exact numbers of 10-cent, 25-cent, and 50-cent coins among the 16 coins in the jar are, respectively, 6, 5, and 2.
Among the 16 coins in the jar there are twice as many 10-cent coins as 1-cent coins.