脑筋急转弯
1.how many months have 28 days?
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2.If two cats are before a cat ,and two cats are behind a cat ,and a cat is in the middle,how many cats are there in all?
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3.Two teachers teach at the same school.One is the mother of the other's son.what relation are they to rach other?
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4.Where does afternoon always come before morning in the world?
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