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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.

Club X has more than 10 but fewer than 40 members. Sometimes the members sit at tables with 3 members at one table and 4 members at each of the other tables, and sometimes they sit at tables with 3 members at one table and 5 members at each of the other tables. If they sit at tables with 6 members at each table except one and fewer than 6 members at that one table, how many members will be at the table that has fewer than 6 members?

Club X has more than 10 but fewer than 40 members. Sometimes the members sit at tables with 3 members at one table and 4 members at each of the other tables, and sometimes they sit at tables with 3 members at one table and 5 members at each of the other tables. If they

Club X has more than 10 but fewer than 40 members. Sometimes the members sit at tables with 3 members at one table and 4 members at each of the other tables, and sometimes they sit at tables with 3 members at one table and 5 members at each of the other tables. If they sit at tables with 6 members at each table except one and fewer than 6 members at that one table, how many members will be at the table that has fewer than 6 members? Read the Full Article »

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 »

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, \( a^k \parallel b \) means that \( a^k \) is a divisor of b, but \( a^{k+1} \) is not a divisor of b. If k is a positive integer and \( 2^k \parallel 72 \), then k is equal to A. 2 B. 3 C. 4 D. 8 E. 18 Correct Answer: B You’ll find tons of practice questions, explanations

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 »