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.

If there are fewer than 8 zeroes between the decimal point and the first nonzero digit in the decimal expansion of (t/1000)^4, which of the following numbers could be the value of t?

If there are fewer than 8 zeroes between the decimal point and the first nonzero digit in the decimal expansion of (t/1000)^4, which of the following numbers could be the value of t? I. 3 II. 5 III. 9 (A) None (B) I only (C) II only (D) III only (E) II and III Correct […]

If there are fewer than 8 zeroes between the decimal point and the first nonzero digit in the decimal expansion of (t/1000)^4, which of the following numbers could be the value of t? Read the Full Article »

Two dice are tossed once. The probability of getting an even number at the first die or a total of 8 is

Two dice are tossed once. The probability of getting an even number at the first die or a total of 8 is A. 1/36 B. 3/36 C. 11/36 D. 20/36 E. 23/36 Correct Answer: D Full explanation coming soon. Send us a note if you’d like this added to the express queue! You’ll find tons

Two dice are tossed once. The probability of getting an even number at the first die or a total of 8 is Read the Full Article »

In the floor plan of an executive’s beach house above, the north and south walls of the living room are parallel. What is the floor area, in square feet, of the bedroom?

In the floor plan of an executive’s beach house above, the north and south walls of the living room are parallel. What is the floor area, in square feet, of the bedroom? A. 450√3 B. 450 C. 225√3 D. 225 E. It cannot be determined from the information given. Correct Answer: C Full explanation coming

In the floor plan of an executive’s beach house above, the north and south walls of the living room are parallel. What is the floor area, in square feet, of the bedroom? Read the Full Article »

A box contains 100 balls, numbered from 1 to 100. If three balls are selected at random and with replacement from the box, what is the probability that the sum of the three numbers on the balls selected from the box will be odd?

A box contains 100 balls, numbered from 1 to 100. If three balls are selected at random and with replacement from the box, what is the probability that the sum of the three numbers on the balls selected from the box will be odd? A. 1/4 B. 3/8 C. 1/2 D. 5/8 E. 3/4 Correct

A box contains 100 balls, numbered from 1 to 100. If three balls are selected at random and with replacement from the box, what is the probability that the sum of the three numbers on the balls selected from the box will be odd? Read the Full Article »

A rope 40 feet long is cut into two pieces. If one piece is 18 feet longer than the other, what is the length, in feet, of the shorter piece?

A rope 40 feet long is cut into two pieces. If one piece is 18 feet longer than the other, what is the length, in feet, of the shorter piece? (A) 9 (B) 11 (C) 18 (D) 22 (E) 29 Correct Answer: B Full explanation coming soon. Send us a note if you’d like this

A rope 40 feet long is cut into two pieces. If one piece is 18 feet longer than the other, what is the length, in feet, of the shorter piece? Read the Full Article »