Can You Figure Out the Number

• 来源期刊: 中学科技
• 年，卷（期）: 2009,（6）
• 所属期刊栏目: 科普英语
• 页码范围: 27
• 页数: 1页
• 语种: 中文

摘要

We have to find my friends Alice and Bill,who live in two different houses on Algebra Avenue. Each of the houses on Algebra Avenue is numbered with a two-digit number from 10 to 99. 1 can't remember where Alice and Bill live,but I remember that their house numbers are the reverse of each other (in the sense that "21" is the reverse of"12".) I also remember that the sum of their two house numbers is a perfect square.