An integer n between 1 and 99, inclusive, is to be chosen at random. What is the probability that n(n+1) will be divisible by 3? (A) 1/9 (B) 1/3 (C) 1/2 (D) 2/3 (E) 5/6 Correct Answer: D Full explanation coming soon. Send us a note if you’d like this added to the express queue! […]
What is the greatest prime factor of 4^17 – 2^28? A. 2 B. 3 C. 5 D. 7 E. 11 Correct Answer: D Full explanation coming soon. Send us a note if you’d like this added to the express queue! You’ll find tons of practice questions, explanations for GMAT Official Guide questions, and strategies on
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In the xy-plane, what is the y-intercept of line l? (1) The slope of line l is 3 times its y-intercept (2) The x-intercept of line l is -1/3 A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient. B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
In the xy-plane, what is the y-intercept of line l? Read the Full Article »
Each of the 25 balls in a certain box is either red, blue or white and has a number from 1 to 10 painted on it. If one ball is to be selected at random from the box, what is the probability that the ball selected will either be white or have an even number
Three grades of milk are 1 percent, 2 percent and 3 percent fat by volume. If x gallons of the 1 percent grade, y gallons of the 2 percent grade, and z gallons of the 3 percent grade are mixed to give x+y+z gallons of a 1.5 percent grade, what is x in terms of
