六年级英语的一道难题
你能算出布朗先生儿子的年龄吗?
Mr.Brownhasfivesons.TheyareTed,Tom,Bob,John.Johnhasnoelderbrotherandhewasfouryearsoldwhenhisfirstyoungerbrotherwasborn.Tomisverylucky.Thenumberofhiselderbrothersisthesameashisyoungerbrothers.Jackwillbe21nextyear,andheisfiveyearsolderthanBob.BobistwoyearsyoungerthanTom.Tedhasnoyoungerbrother.Thereis12yearsbetwwenhimandJohn.HowoldareMr.Brown'ssons?
John______Jack_____Tom_________Bob______Ted_______
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