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.

In the correctly worked addition problem shown, P, Q, R, and S are digits. If Q = 2P, which of the following could be the value of S?

   3P5 +4QR ––––––––    8S4 In the correctly worked addition problem shown, P, Q, R, and S are digits. If Q = 2P, which of the following could be the value of S? A. 3 B. 4 C. 5 D. 7 E. 9 Correct Answer: A Full explanation coming soon. Send us a note if you’d like this added to the express […]

In the correctly worked addition problem shown, P, Q, R, and S are digits. If Q = 2P, which of the following could be the value of S? Read the Full Article »

A worker carries jugs of liquid soap from a production line to a packing area, carrying 4 jugs per trip. If the jugs are packed into cartons that hold 7 jugs each, how many jugs are needed to fill the last partially filled carton after the worker has made 17 trips?

A worker carries jugs of liquid soap from a production line to a packing area, carrying 4 jugs per trip. If the jugs are packed into cartons that hold 7 jugs each, how many jugs are needed to fill the last partially filled carton after the worker has made 17 trips? A. 1 B. 2

A worker carries jugs of liquid soap from a production line to a packing area, carrying 4 jugs per trip. If the jugs are packed into cartons that hold 7 jugs each, how many jugs are needed to fill the last partially filled carton after the worker has made 17 trips? Read the Full Article »

If k is an integer and (0.0025)(0.025)(0.00025) × 10ᵏ is an integer, what is the least possible value of k?

If k is an integer and (0.0025)(0.025)(0.00025) × 10k 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 for GMAT

If k is an integer and (0.0025)(0.025)(0.00025) × 10ᵏ is an integer, what is the least possible value of k? Read the Full Article »

The number line shown contains three points R, S, and T, whose coordinates have absolute values r, s, and t, respectively. Which of the following equals the average (arithmetic mean) of the coordinates of the points R, S, and T?

The number line shown contains three points R, S, and T, whose coordinates have absolute values r, s, and t, respectively. Which of the following equals the average (arithmetic mean) of the coordinates of the points R, S, and T? A. s B. s+t-r C. (r-s-t)/3 D. (r+s+t)/3 E. (s+t-r)/3 Correct Answer: E Full explanation coming soon. Send us a note if you’d like

The number line shown contains three points R, S, and T, whose coordinates have absolute values r, s, and t, respectively. Which of the following equals the average (arithmetic mean) of the coordinates of the points R, S, and T? Read the Full Article »