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.

When positive integer x is divided by positive integer y, the remainder is 9. If x/y = 96.12, what is the value of y?

When positive integer x is divided by positive integer y, the remainder is 9. If x/y = 96.12, what is the value of y? A. 96 B. 75 C. 48 D. 25 E. 12 Correct Answer: B Full explanation coming soon. Send us a note if you’d like this added to the express queue! You’ll find tons of practice questions, […]

When positive integer x is divided by positive integer y, the remainder is 9. If x/y = 96.12, what is the value of y? Read the Full Article »

If n is a positive integer and the product of all the integers from 1 to n, inclusive, is divisible by 990, what is the least possible value of n?

If n is a positive integer and the product of all the integers from 1 to n, inclusive, is divisible by 990, what is the least possible value of n? A. 8 B. 9 C. 10 D. 11 E. 12 Correct Answer: D Full explanation coming soon. Send us a note if you’d like this

If n is a positive integer and the product of all the integers from 1 to n, inclusive, is divisible by 990, what is the least possible value of n? Read the Full Article »

The value of (2⁻¹⁴+2⁻¹⁵+2⁻¹⁶+2⁻¹⁷)/5 is how many times the value of 2⁻¹⁷?

The value of (2−14+2−15+2−16+2−17)/5 is how many times the value of 2−17? A. 3/2 B. 5/2 C. 3 D. 4 E. 5 Correct Answer: C Full explanation coming soon. Send us a note if you’d like this added to the express queue! You’ll find tons of practice questions, explanations for GMAT Official Guide questions, and strategies on

The value of (2⁻¹⁴+2⁻¹⁵+2⁻¹⁶+2⁻¹⁷)/5 is how many times the value of 2⁻¹⁷? Read the Full Article »

For the positive integers a, b, and k, ak||b means that ak is a divisor of b, but ak+1 is not a divisor of b. If k is a positive integer and 2k||72, then k is equal to

For the positive integers a, b, and k, ak||b means that ak is a divisor of b, but ak+1 is not a divisor of b. If k is a positive integer and 2k||72, then k is equal to A. 2 B. 3 C. 4 D. 8 E. 18 Correct Answer: B Full explanation coming soon. Send us a note if you’d like this added to the express queue! You’ll find

For the positive integers a, b, and k, ak||b means that ak is a divisor of b, but ak+1 is not a divisor of b. If k is a positive integer and 2k||72, then k is equal to Read the Full Article »

Each year for 4 years, a farmer increased the number of trees in a certain orchard by 1/4 of the number of trees in the orchard the preceding year. If all of the trees thrived and there were 6,250 trees in the orchard at the end of the 4-year period, how many trees were in the orchard at the beginning of the 4-year period?

Each year for 4 years, a farmer increased the number of trees in a certain orchard by 1/4 of the number of trees in the orchard the preceding year. If all of the trees thrived and there were 6,250 trees in the orchard at the end of the 4-year period, how many trees were in

Each year for 4 years, a farmer increased the number of trees in a certain orchard by 1/4 of the number of trees in the orchard the preceding year. If all of the trees thrived and there were 6,250 trees in the orchard at the end of the 4-year period, how many trees were in the orchard at the beginning of the 4-year period? Read the Full Article »