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 a village of 100 households, 75 have at least one DVD player, 80 have at least one cell phone, and 55 have at least one MP3 player. If x and y are respectively the greatest and lowest possible number of households that have all three of these devices, x – y is:

In a village of 100 households, 75 have at least one DVD player, 80 have at least one cell phone, and 55 have at least one MP3 player. If x and y are respectively the greatest and lowest possible number of households that have all three of these devices, x – y is: A. 65 […]

In a village of 100 households, 75 have at least one DVD player, 80 have at least one cell phone, and 55 have at least one MP3 player. If x and y are respectively the greatest and lowest possible number of households that have all three of these devices, x – y is: Read the Full Article »

If is n is multiple of 5, and n=p^2*q where p and q are prime, which of the following must be a multiple of 25?

If is n is multiple of 5, and n=p^2*q where p and q are prime, which of the following must be a multiple of 25? A. p^2 B. q^2 C. pq D. p^2*q^2 E. p^3*q Correct Answer: D Full explanation coming soon. Send us a note if you’d like this added to the express queue!

If is n is multiple of 5, and n=p^2*q where p and q are prime, which of the following must be a multiple of 25? Read the Full Article »