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 figure shown, the triangle is inscribed in the semicircle. If the length of line segment AB is 8 and the length of line segment BC is 6, what is the length of arc ABC?

In the figure shown, the triangle is inscribed in the semicircle. If the length of line segment AB is 8 and the length of line segment BC is 6, what is the length of arc ABC? A. 15π B. 12π C. 10π D. 7π E. 5π Correct Answer: E Full explanation coming soon. Send us a note if you’d like […]

In the figure shown, the triangle is inscribed in the semicircle. If the length of line segment AB is 8 and the length of line segment BC is 6, what is the length of arc ABC? Read the Full Article »

For a party, three solid cheese balls with diameters of 2 inches, 4 inches, and 6 inches, respectively, were combined to form a single cheese ball. What was the approximate diameter, in inches, of the new cheese ball? (The volume of a sphere is 4/3(πr³), where r is the radius.)

For a party, three solid cheese balls with diameters of 2 inches, 4 inches, and 6 inches, respectively, were combined to form a single cheese ball. What was the approximate diameter, in inches, of the new cheese ball? (The volume of a sphere is 4/3(πr³), where r is the radius.) A. 12 B. 16 C. ³√16 D. 3(³√18)

For a party, three solid cheese balls with diameters of 2 inches, 4 inches, and 6 inches, respectively, were combined to form a single cheese ball. What was the approximate diameter, in inches, of the new cheese ball? (The volume of a sphere is 4/3(πr³), where r is the radius.) Read the Full Article »

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 »