Four "2" digits to make the result 7 using any mathematical means. Says,
2 -2 + 2 - 2 = 0
2 - 2 + 2/2 = 1
and etc.
收錄日期: 2021-04-13 15:52:58
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https://hk.answers.yahoo.com/question/index?qid=20080726000051KK00513