英语翻译1、One of the most famous puzzles in the math world is“How old is Ann?”Here's one.Ann is now exactly two-fifths of her older sister's age.Conversely,two years ago,Ann was only one-fourth the age of her older sister's age at that time.How old is Ann now?(She's a fairly young child,by the way)2、You have stealthily raided your small child's piggy bank.You feel slightly guilty as you count the money.You have the same number of dimes and quarters(二角五分硬币
英语翻译
1、One of the most famous puzzles in the math world is“How old is Ann?”Here's one.Ann is now exactly two-fifths of her older sister's age.Conversely,two years ago,Ann was only one-fourth the age of her older sister's age at that time.How old is Ann now?(She's a fairly young child,by the way)
2、You have stealthily raided your small child's piggy bank.You feel slightly guilty as you count the money.You have the same number of dimes and quarters(二角五分硬币）,totaling exactly Yuan 2.45.When you turn honest and put it back,how many of each coin will you need to replace?(Your child keeps a record of how much she puts in and in what denomination(面额）,of course.)
1.在数学世界里最为著名的难题之一是“安的年龄是多少？”这里的第一个提示是，安现在的年龄精确地等于她的老姐姐年龄的2/5，时间倒流，2年前，ann仅仅只是她的老姐年龄的1/4，那么安现在多大呢？（顺便说一下，安是一个年纪相当小的小孩）
答案是 安现在的年龄为：4岁
2.你已经悄悄地掠夺了你的小孩的存钱罐。当你数这些钱的时候你感到些许的负罪感。你获得了同样数量的一角硬币和二角五分硬币，总和精确地为2.45元。当你变诚实并把它们放回去的时候，每一种硬币你需要放入多少的数量呢？（当然，你的小孩对他的硬币，数量及面额都一个记录。）
答案是 两种硬币都是7枚
1.数学界最为著名的谜题之一是“安有多大？”这里有一个。安现在确切的说，是她年长姐姐年龄的五分之二。相反的，两年前，安那时只是她年长姐姐年龄的四分之一。现在安有多大了？（顺便说一下，她是一个相当年轻的孩子）
答案：安现在4岁
2.你偷偷的检查你孩子的小猪存钱罐。数钱的时候你稍微有些愧疚。你有数目为二角五分的硬币，总共确切的是2.45圆。当你变的诚实要把它放回的时候，每一枚硬币你需要置换多少次？（你的孩子纪录了她放了多少钱和是什么面额，当然）
一道数学界最著名的谜题.“安的年龄”安今年年龄是她姐姐2/5,两年前是她姐姐的1/4.
设安今年x岁 她姐姐今年5x/2岁
(x+2)*4=5x/2+2
解得x=4
安今年4岁 姐姐今年10岁
你忐忑地拿走了你孩子的存钱罐.其中一角的硬币和二角五分的硬币一样多.总共2.45元.当你归还时,每种硬币应该归还多少
2.45/(0.1+0.25)=7(枚)
每种硬币归还7枚