下面GMAT思为大家整理了GMAT数学备考资料:练习+讲解(9),供考生们参考,以下是详细内容。
11、S=m and m is a positive integer. Which of the following must be true?
S is divisible by 3
S is divisible by 4
S is divisible by 6
【答案】1 AND 3
【思路】连续的三个自然数既可以被2整除,也可被3整除,则可被6整除。而M与刚好相差3,也就是M+3值的特征与M值的特征是一样的,则S可以看成连续的三个自然数
12、一个经理在12个时间段中任选7个,interview7个申请人,问:有几种方法?
【答案】P
【思路】从12个时间段中选7个,与7个申请人进行全排列。
或者第一个可从12个时间段中选一个,依次,第二个可从11个中选一个。。。等等,总共有1211109876中方法。
13、f=2^x3^y5^z,x, y, z分别是整数n的百位、十位和个位。f=9f,m-h=?
【答案】20
【思路】f=9f=3^2 f,根据题目可知3^2是Y的指数相差2,而X、Z是相同的,又Y是整数的十位。则f 比f2个十位,也就是20
14、For all x, x^2+6x+q,q为常数,问q=?
^2+4=x^2+6x+q
=x^2+6x+q
【答案】A
【思路】^2+4=x^2+6x+q= x^2+2rx+r^2+4则2r=6 r和^2+4=q 因此r=3 q=13
=x^2+6x+q= x^2+x+ mn 则m + n=6和mn=q 由于M和N的值无法确定,则Q的值也无法确定
15、在一个X-Y坐标轴上,直线L过点和点,问:以下哪条直线与L平行?
3Y-2X=0
3Y+2X=0
3Y-2X=6
3Y+2X=6
2Y-3X=0
【答案】A
【思路】先求出L的直线方程为3Y-2X=6,那么与L平行的直线方程为3Y-2X=K,则至于方程A了
以上就是GMAT数学备考资料:练习+讲解(9)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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