A man is 48 years old. He asks the other man how old he is. The other man answer

游客2024-08-08  8

问题 A man is 48 years old. He asks the other man how old he is. The other man answers: "I am twice as old as you were when I was as old as you are today." How old is the other man?

选项 A、32
B、48
C、64
D、80

答案 C

解析 假定我现在X岁,当我48岁时,你的年龄是Y岁。因而,X=2Y,X-48=48-Y,用这两个等式,得出X=64。
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