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英语……急智力测试题Bill,George,SallyandAnnarebrothersandsisters.Idon'tknowhowoldeachofthemis.Ionlyknowthatoneofthemis18,oneis15,oneoftheboysis16andoneofthegirlsis17.IalsoknowthatBillisolderthanS

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英语……急 智力测试题
Bill,George,Sally and Ann are brothers and sisters.I don't know how old each of them is.I only know that one of them is 18,one is 15,one of the boys is 16 and one of the girls is 17.I also know that Bill is older than Sally but Ann isn't.How old is Ann?How old is Bill?How old is George?How old is Sally?
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答案和解析
bill is 18
george is 16
ann is 15
sally is 17
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