下面GMAT思为大家整理了GMAT数学备考资料:练习+讲解(11),供考生们参考,以下是详细内容。
1、j, k均为positive integer, j和k的greatest common divisor?
j=k+1;
jk is divisible by 5;
【答案】A
【思路】
两个相邻正整数的最大公约数是1
J=3,K=15,最大公约数是3;J=5,K=15,最大公约数=5
2、已知AB=BC=CD=DE,且AE=10,求AB?
【答案】:5【思路】:AB=BC=X,所以AC=X根号2,CD=X,所以AD=X根号3,DE=X,所以AE=2X=10,所以X=5
3、已知下列图表的每一行和每一列中,1,2,3出现且只出现一次,r=?
rSt
uwx
vyZ
w+z=6;
s+t+u+v=6;
【答案】D
【思路】
从条件1,得w,z均为3,由于各列,各行不得重复,推出r=3
条件2 得出s+t=3,u+v=3得每行剩下的r必为3
4、某批商品样式分为r,d两种,形状有大小两种,大的占40%,问d的比例?
大中有30%d;
小中有40%d;
【答案】C
【思路】
大中有30%d,因为不知道小中d占的比例,无法求出d的比例。
小中有40%d,同样不知道大中占的比例,无法求出d的比例,
40%30%+6040%=36%
5、从1-100中任意选7个数,问它们分别除以7后所得的余数的和是否是7的倍数?
这7个数的range为6;
这7个数consecutive;
【答案】D
【思路】
这7个数的RANGE为6, for example, 如果确定最小的数为3, 由于RANGE为6,可以得出最大数为9,therefore,其实也就是7个连续的数被选
五个连续正整数,分别除以7,分别余1,2,3,4,5,6,0,相加得21,被7整除。
以上就是GMAT数学备考资料:练习+讲解(11)的详细内容,考生可针对文中介绍的方法进行有针对性的备考。最后,GMAT预祝大家在GMAT考试中取得好成绩!
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