If it were two hours later, it would be half as long until midnight as it would be if it were an hour later. What time is it now

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问题 If it were two hours later, it would be half as long until midnight as it would be if it were an hour later. What time is it now?

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答案21:00

解析题意为：假如再过两小时，那么距离午夜的时间(24点)将是再过一小时后距离午夜时间的一半。那么假设现在的时间为X，可以列出式子24一(X+1)=2[24一(X一2)]，得出X为21。

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