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1、游戏类(1)Itispossibletodomanysimpletrickswithnumbers.Hereisonetrick.Ithassevensteps.First,writedownyourhousenumber.Forexample,ifyouraddressis73LemonStreet,youwouldwritedown73.Next,double(翻一倍)it.Inotherwords,multiply(乘)itbytwo.Then,addfivetothisdoublednumber.Forexample,ifyouraddresswas73andyoudoubled
2、it,youwouldget146.Then,ifyouaddedfive,you’dget151.So,torepeatthefirstthreesteps,writedownyourhousenumber,doubleit,andaddfive.Fourth,multiplythisnumberby50.Inourexamplehere,ifyoumultiply151by50,you’llget7550.Thefifthstepistoaddyouragetothistotal.Forexample,ifyou’re26yearsold,youshouldadd26tothisto
3、tal.Inourexamplehere,theresultwouldbe7550plus26,you’llget7576.Sixth,youhavetoaddthenumberofdaysinayear,whichis365.Inourexamplehere,365addedto7576is7941.Theseventhandfinalstepisthis:subtract(减)615fromthenumberthatyouhave.Inourexample,7941minus615is7326.Theresulthere,7-3-2-6,isthetrick.Thefirstpart
4、ofthenumberistheaddressandthelastpartofthenumberistheageoftheperson.Thatis,73istheaddressthatwestartedwith,and26istheagethatweused.Ifyoufollowthesesevenstepswithanyaddressandtheageofanyperson.Youwillgetthesameresult.1.Accordingtothetrick,whatnumbercanyougetifyouare16yearsoldandyourhousenumberis85
5、？A.1685B.8516C.8165D.16582.Howcanyouragenumberappearatthelastpartoftheresult?A.It’sreallyatrick.B.BytakingallthestepsexceptStep1andStep2.C.BytakingStep6andStep7.D.Bytakingallthesteps.3.What’sthesecretofthetrick?A.It’simpossibletoknow.B.BytakingStep2andStep4,wegettheformula(公式)：youraddressnumber×2
6、×50.C.Bytakingallthestepsexcept1and2,wegettheformula:5×50+youragenumber+365－615=youragenumber.D.BothBandC.4.Isitpossibleforustodesignanotherprogramofgettingthesameresult？A.No,it’simpossibletofindoutanotherway.B.Noproblem.C.I’mnotsure.4用心爱心专心D.It’snothingbutatrick.【答案与解析】本文主要介绍一个数学的小把戏。1.B。推断题。由文章
7、的倒数第2段，“Thefirstpart…”我们可以得出这条算术的答案：共有四位数字，前两位是地址的号码，后两位是年龄的数字，所以答案是B。2.D。推断题。只有将步骤全部算完才可以得出答案，因此选D。3.D。推断题。通过选项B的公式可以算出地址号码的100倍，即答案的前两位数字；通过选项C可以算出年龄的数字，也是答案的后两位。将B，C两项加起来就揭开了把戏的秘密，据此可推出答案为D。4.B。推理题。根据常理，我们知道数学的奥妙是无穷
