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Andrew Geller

Andrew Geller is a top GMAT tutor based out of New York City. Throughout his career he has successfully taught people from many different backgrounds, countries, and starting scores.

Car A is 20 miles behind car B, which is traveling in the same direction along the same route as Car A.Car A is traveling at a constant speed of 58 miles per hour and Car Bis traveling at a constant speed of 50miles per hour. How many hours will it take for Car A to overtake and drive 8 miles ahead of Car B?

Car A is 20 miles behind car B, which is traveling in the same direction along the same route as Car A.Car A is traveling at a constant speed of 58 miles per hour and Car Bis traveling at a constant speed of 50miles per hour. How many hours will it take for Car A

Car A is 20 miles behind car B, which is traveling in the same direction along the same route as Car A.Car A is traveling at a constant speed of 58 miles per hour and Car Bis traveling at a constant speed of 50miles per hour. How many hours will it take for Car A to overtake and drive 8 miles ahead of Car B? Read the Full Article »

Clarissa will create her summer reading list by randomly choosing 4 books from the 10 books approved for summer reading. She will list the books in the order in which they are chosen. How many different lists are possible?

Clarissa will create her summer reading list by randomly choosing 4 books from the 10 books approved for summer reading. She will list the books in the order in which they are chosen. How many different lists are possible? A. 6 B. 40 C. 210 D. 5,040 E. 151,200 A. Statement (1) ALONE is sufficient,

Clarissa will create her summer reading list by randomly choosing 4 books from the 10 books approved for summer reading. She will list the books in the order in which they are chosen. How many different lists are possible? Read the Full Article »

If 1/3 of the total number of marbles in the three bags listed in the table above are blue, how many marbles are there in bag Q?

If 1/3 of the total number of marbles in the three bags listed in the table above are blue, how many marbles are there in bag Q? (A) 5 (B) 9 (C) 12 (D) 23 (E) 46 Correct Answer: B You’ll find tons of practice questions, explanations for GMAT Official Guide questions, and strategies on

If 1/3 of the total number of marbles in the three bags listed in the table above are blue, how many marbles are there in bag Q? Read the Full Article »

Right triangle PQR is to be constructed in the xy-plane so that the right angle is at P and PR is parallel to the x-axis. The x- and y-coordinates of P, Q, and R are to be integers that satisfy the inequalities -4 <= x <= 5 and 6<= y<= 16. How many different triangles with these properties could be constructed?

Right triangle PQR is to be constructed in the xy-plane so that the right angle is at P and PR is parallel to the x-axis. The x- and y-coordinates of P, Q, and R are to be integers that satisfy the inequalities -4 <= x <= 5 and 6<= y<= 16. How many different triangles

Right triangle PQR is to be constructed in the xy-plane so that the right angle is at P and PR is parallel to the x-axis. The x- and y-coordinates of P, Q, and R are to be integers that satisfy the inequalities -4 <= x <= 5 and 6<= y<= 16. How many different triangles with these properties could be constructed? Read the Full Article »

If k is an integer and (.0025)(.025)(.00025)10^k is an integer, what is the least possible value of K?

If k is an integer and (.0025)(.025)(.00025)10^k is an integer, what is the least possible value of K? (A) -12 (B) -6 (C) 0 (D) 6 (E) 12 Correct Answer: E 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

If k is an integer and (.0025)(.025)(.00025)10^k is an integer, what is the least possible value of K? Read the Full Article »