Blog Detail

GMAT and GRE Math

GMAT and GRE Math

http://gmatgremath.blogspot.com

I offer free help on GMAT and GRE test prep questions. Email me a math problem and I'll explain it on the blog. It's a great source of free practice questions and study material.

View More Recent Posts

  • (Q 214) GMAT/GRE Number Properties

    Posted on Saturday February 6th, 2010 at 02:11 pm in algebra, number properties

    There are 3 distinct integer solutions to the equation w³ - 49w = 120. Two of the integers are negative, and the other is positive. What is the sum of the smallest and largest solution?(A) -5(B) -2(C) 0(D) 3(E) 4We need to find 3 integer values o...

  • (Q 213) GMAT/GRE Geometry

    Posted on Friday February 5th, 2010 at 03:48 pm in geometry

    The figure above shows the front view of 3 cylindrical pipes stacked on one another. The bottom 2 pipes have a radius of 5, and the top pipe has a diameter of 8. What is the height of the stack?(A) 8π(B) 16 + sqrt(13)(C) 8 + 5π(D) 26(E) 25The he...

  • (Q 212) GMAT Data Sufficiency

    Posted on Wednesday February 3rd, 2010 at 01:36 pm in data sufficiency medium

    In 1991, a company's revenue was 40% greater than in the previous year, while its costs decreased by 30% from the previous year. Did the company turn a profit in 1991?(1) In 1990, costs were 50% greater than the revenue(2) In 1990, costs were $1000...

  • (Q 211) GMAT/GRE Factoring

    Posted on Tuesday February 2nd, 2010 at 12:39 pm in factoring, algebra

    If y is a positive integer and y³ - y = 210, what is the value of 2y/(y-3)?(A) 5(B) 4(C) 7/2(D) 5/2(E) 2The equation y³ - y = 210 can be simplified on the left hand side by first factoring out the y:y(y² - 1) = 210.Then, if you notice another fac...

  • (Q 210) GMAT/GRE Quadratic Equation

    Posted on Monday February 1st, 2010 at 01:17 pm in quadratic

    A rectangular box has dimensions 10, x, and 2x. If its surface area is 400, what is its volume?(A) 720(B) 500(C) 480(D) 400(E) 320This problem can be solved directly, or by using the answer choices to guess-and-check. We will show both methods.Met...

  • (Q 209) GRE Quantitative Comparison

    Posted on Sunday January 31st, 2010 at 03:31 pm in arithmetic, quantitative comparison medium

    The price of a $200 TV at Store X is increased by 25%, then increased by 40%, then decreased by 25%, then decreased by 20%. The price of that $200 TV at Store Y is decreased by 10%, then increased by 10%, then decreased by 30%, then increased by 50...

Post A Comment/Review

Log In or Sign Up to leave a comment.