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.

The figure shown above represents a modern painting that consists of four differently colored rectangles, each of which has length ℓ and width w. If the area of the painting is 4,800 square inches, what is the width, in inches, of each of the four rectangles?

The figure shown above represents a modern painting that consists of four differently colored rectangles, each of which has length ℓ and width w. If the area of the painting is 4,800 square inches, what is the width, in inches, of each of the four rectangles? A. 15 B. 20 C. 25 D. 30 E. 40 Correct […]

The figure shown above represents a modern painting that consists of four differently colored rectangles, each of which has length ℓ and width w. If the area of the painting is 4,800 square inches, what is the width, in inches, of each of the four rectangles? Read the Full Article »

If k and n are positive integers such that n > k, then k! + (n – k) · (k – 1)! is equivalent to which of the following?

If k and n are positive integers such that n > k, then k! + (n – k) · (k – 1)! is equivalent to which of the following? A. k · n! B. k! · n C. (n – k)! D. n · (k + 1)! E. n · (k – 1)! Correct Answer: E Full explanation coming soon. Send us a note if you’d

If k and n are positive integers such that n > k, then k! + (n – k) · (k – 1)! is equivalent to which of the following? Read the Full Article »

An American dealer bought a table in Germany for 480 marks and sold the same table in France for 2,385 francs. What was the dealer’s gross profit on the two transactions in dollars?

Exchange Rates in a Particular Year $1 = 5.3 francs $1 = 1.6 marks An American dealer bought a table in Germany for 480 marks and sold the same table in France for 2,385 francs. What was the dealer’s gross profit on the two transactions in dollars? A. $0 B. $50 C. $100 D. $150

An American dealer bought a table in Germany for 480 marks and sold the same table in France for 2,385 francs. What was the dealer’s gross profit on the two transactions in dollars? Read the Full Article »

If 65 percent of a certain firm’s employees are full-time and if there are 5,100 more full-time employees than part-time employees, how many employees does the firm have?

If 65 percent of a certain firm’s employees are full-time and if there are 5,100 more full-time employees than part-time employees, how many employees does the firm have? A. 8,250 B. 10,200 C. 11,050 D. 16,500 E. 17,000 Correct Answer: E Full explanation coming soon. Send us a note if you’d like this added to

If 65 percent of a certain firm’s employees are full-time and if there are 5,100 more full-time employees than part-time employees, how many employees does the firm have? Read the Full Article »

A certain state’s milk production was 980 million pounds in 2007 and 2.7 billion pounds in 2014. Approximately how many more million gallons of milk did the state produce in 2014 than in 2007? (1 billion = 10⁹ and 1 gallon = 8.6 pounds.)

A certain state’s milk production was 980 million pounds in 2007 and 2.7 billion pounds in 2014. Approximately how many more million gallons of milk did the state produce in 2014 than in 2007? (1 billion = 109 and 1 gallon = 8.6 pounds.) A. 100 B. 200 C. 1,700 D. 8,200 E. 14,800 Correct Answer: B

A certain state’s milk production was 980 million pounds in 2007 and 2.7 billion pounds in 2014. Approximately how many more million gallons of milk did the state produce in 2014 than in 2007? (1 billion = 10⁹ and 1 gallon = 8.6 pounds.) Read the Full Article »