为了便于大家更好的对GMAT备考资料之数学练习题目+答案，一起来对以下数学题目进行练习吧。希望能够对大家更好的备考GMAT考试有帮助。
1、What is the value of|x| ?
(1) x=-|x|
(2) x^2 = 4
答案：B
2、The number ofstamps that Kaye and Alberto had were in the ratio 5 : 3, respectively. After Kaye gave Alberto 10 of her stamps, theratio of the number Kaye had to the number Alberto had was 7 :5. As a result of this gift,Kaye had how many more stamps than Alberto?
(A) 20
(B) 30
(C) 40
(D) 60
(E) 90
题目翻译：kaye 和 alberto 的邮票数之比为 5比 3，当 kaye 给 alberto10 张邮票，邮票数之比为 7比 5 ，kaye 比 alberto 多几张邮票?
思路点拨：列二元一次方程，分别设 kaye 和 alberto 的邮票数为 X 和 Y。 x/y=5/3, (x-10)/(y+10)=7/5,解方程即可。
Caution!：记得求出 X 和 Y 之后要相减
3、If x is anegative integer, which of the following expressions has the LEAST value?
(A) x^2 -0.50
(B) x^2 - 0.51
(C) x^3 - 0.502
(D) x^3 - 0.511
(E) x^4 - 0.512
参考答案：D
4、June 25, 1982, fell on a Friday. On which day of the week did June 25, 1987, fall? (Note: 1984 was a leap year.)
A. Sunday
B. Monday
C. Tuesday
D. Wednesday
E. Thursday
参考答案：E
题目翻译：1982年6月5号周五，1987年6月25号周几?
题目全解：每年是由365天组成.相当于52个整周加1天. 所以，正常每一个年的6月25日会比前一年多一天。但是，由于1984年是闰年，所以下一年85比前一年84多出2天。(= 1984年一共有366天)
所以答案是 E
1982 : friday
1983: saturday
1984: monday
1985: tuesay
1986: wednesday
1987: thursday