一个英语竞赛智力题When David is twice as old as he is now he will be
一个英语竞赛智力题
When David is twice as old as he is now he will be four times as old as his daughter Jane will be in five years time.If in 1990,four years ago,he was four times as old as his daughter,in what year was she born?
When David is twice as old as he is now he will be four times as old as his daughter Jane will be in five years time.If in 1990,four years ago,he was four times as old as his daughter,in what year was she born?
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