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 certain business, production index p is directly proportional to efficiency index e, which is in turn directly proportional to investment i. What is p if i = 70?

In a certain business, production index p is directly proportional to efficiency index e, which is in turn directly proportional to investment i. What is p if i = 70? (1) e = 0.5 whenever i = 60 (2) p = 2.0 whenever i = 50 A. Statement (1) ALONE is sufficient, but statement (2)

In a certain business, production index p is directly proportional to efficiency index e, which is in turn directly proportional to investment i. What is p if i = 70? Read the Full Article »

The product of two negative numbers is 160. If the lesser of the two numbers is 4 less than twice the greater, what is the greater number?

The product of two negative numbers is 160. If the lesser of the two numbers is 4 less than twice the greater, what is the greater number? (A) -20 (B) -16 (C) -10 (D) -8 (E) -4 Correct Answer: D Full explanation coming soon. Send us a note if you’d like this added to the

The product of two negative numbers is 160. If the lesser of the two numbers is 4 less than twice the greater, what is the greater number? Read the Full Article »