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1、www.zhan.comGMAT数学笔记GMAT数学备考关键词一、知识点：准确掌握二、词汇、表达法：读懂题目三、熟练：平均两分钟一道题考试相关问题一、时间与题量二、题型三、机经与换题库四、其它Ifaandbarepositiveintegerssuchthata–banda/barebothevenintegers,whichofthefollowingmustbeanoddinteger?（A）a/2（B）b/2（C）(a+b)/2（D）(a+2)/2（E）(b+2)/2IfMistheleastcommonmultipleof90,196,a
2、nd300,whichofthefollowingisNOTafactorofM?(A)600(B)700(C)900(D)2,100(E)4,900复习注意事项*战略上重视*初等数学的思维*解法力求稳妥清晰*把握好DS题型*熟练重于技巧推荐复习步骤*知识点查缺补漏*背熟词汇*复习课上所学*OG，及其它相关资料*机经：www.chasedream.comwww.zhan.com第一章算术www.zhan.com1.integer(wholenumber):整数*positiveinteger：正整数，从1开始，不包括0。2.odd&evennum
3、ber奇数与偶数*凡整数均具有奇偶性，如－1是奇数，0是偶数。*奇+奇=偶，奇+偶=奇…若干个整数相乘，除非都是奇数，其乘积才会是奇数…例：Ifaandbarepositiveintegerssuchthata–bandwhichaarebothevenintegers,bwww.zhan.comofthefollowingmustbeanoddinteger?www.zhan.com(A）a(B）b(C)a+b(D)a+2(E)b+2www.zhan.com222223.primenumber&compositenumber质数与合
4、数*Aprimenumberisapositiveintegerthathasexactlytwodifferentpositivedivisors,1anditself.*Acompositenumberisapositiveintegergreaterthan1thathasmorethantwodivisors.*Thenumbers1isneitherprimenorcomposite,2istheonlyevenprimenumber.4.factor(divisor)&primefactor因子和质因子*一个数能被哪些数整除，这些数就
5、叫它的因子（因数、约数）。*因子里的质数叫质因子（数）。例1：Ifn=4p,wherepisaprimenumbergreaterthan2,howmanydifferentpositiveevendivisorsdoesnhave,includingn?(A)2(B)3(C)4(D)6(E)8例2：Iftheintegernhasexactlythreepositivedivisors,including1andn,howmanypositivedivisorsdoesn2have?(A)4(B)5(C)6(D)8(E)9例3：1225有几个因
6、子？例：Whatisthegreatestprimefactorof2100-296?(A)2(B)3(C)5(D)7(E)11www.zhan.com例：Apositiveintegernissaidtobe“prime-saturated”iftheproductofallthedifferentpositiveprimefactorsofnislessthanthesquarerootofn.Whatisthegreatesttwo-digitprime-saturatedinteger?(A)99(B)98(C)97(D)96(E)955
7、.thegreatestcommondivisor(GCD)&theleastcommonmultiple(LCM)最大公约数和最小公倍数例：IfMistheleastcommonmultipleof90,196,and300,whichofthefollowingisNOTafactorofM?(A)600(B)700(C)900(D)2,100(E)4,900例：Whatisthelowestpositiveintegerthatisdivisiblebyeachoftheintegers1through7,inclusive?(A)420(
8、B)840(C)1,260(D)2,520(E)5,0406.decimals&fractions小数和分数*相关词汇：reaccuri
