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.

Last year a state senate consisting of only Republican and Democrat members had 20 more Republican members than Democrat members. This year the senate has the same number of members as last year, but it has 2 fewer Republican members than last year. If this year the number of Republican members is 2/3 the number of senate members, how many members does the senate have this year?

Last year a state senate consisting of only Republican and Democrat members had 20 more Republican members than Democrat members. This year the senate has the same number of members as last year, but it has 2 fewer Republican members than last year. If this year the number of Republican members is 2/3 the number of senate […]

Last year a state senate consisting of only Republican and Democrat members had 20 more Republican members than Democrat members. This year the senate has the same number of members as last year, but it has 2 fewer Republican members than last year. If this year the number of Republican members is 2/3 the number of senate members, how many members does the senate have this year? Read the Full Article »

The profit P, in dollars, for any given month at a certain company is defined by P = I – C, where I represents total income, in dollars, and C represents total costs, in dollars, for the month. For each of the first 4 months of the year, C = I + 32,000; and for each of the next 3 months, I = C + 36,000. If I = C + 10,000 for each of the 5 remaining months of the year, what was the company’s total profit for the 12-month year?

The profit P, in dollars, for any given month at a certain company is defined by P = I – C, where I represents total income, in dollars, and C represents total costs, in dollars, for the month. For each of the first 4 months of the year, C = I + 32,000; and for each of the next 3 months, I = C + 36,000. If I = C + 10,000 for each of the 5

The profit P, in dollars, for any given month at a certain company is defined by P = I – C, where I represents total income, in dollars, and C represents total costs, in dollars, for the month. For each of the first 4 months of the year, C = I + 32,000; and for each of the next 3 months, I = C + 36,000. If I = C + 10,000 for each of the 5 remaining months of the year, what was the company’s total profit for the 12-month year? Read the Full Article »

For all real numbers a, b, c, d, e, and f, the operation Θ is defined by the equation (a, b, c) Θ (d, e, f) = ad + be + cf. What is the value of (1,−2,3)θ(1,−1/2,1/3)?

For all real numbers a, b, c, d, e, and f, the operation Θ is defined by the equation (a, b, c) Θ (d, e, f) = ad + be + cf. What is the value of (1,−2,3)θ(1,−1/2,1/3)? A. -1 B. 5/6 C. 1 D. 5/2 E. 3 Correct Answer: E Full explanation coming soon. Send us a note if you’d like this added to the express queue! You’ll find tons

For all real numbers a, b, c, d, e, and f, the operation Θ is defined by the equation (a, b, c) Θ (d, e, f) = ad + be + cf. What is the value of (1,−2,3)θ(1,−1/2,1/3)? Read the Full Article »

If the mass of 1 cubic centimeter of a certain substance is 7.3 grams, what is the mass, in kilograms, of 1 cubic meter of this substance? (1 cubic meter = 1,000,000 cubic centimeters; 1 kilogram = 1,000 grams)

If the mass of 1 cubic centimeter of a certain substance is 7.3 grams, what is the mass, in kilograms, of 1 cubic meter of this substance? (1 cubic meter = 1,000,000 cubic centimeters; 1 kilogram = 1,000 grams) A. 0.0073 B. 0.73 C. 7.3 D. 7,300 E. 7,300,000 Correct Answer: D Full explanation coming

If the mass of 1 cubic centimeter of a certain substance is 7.3 grams, what is the mass, in kilograms, of 1 cubic meter of this substance? (1 cubic meter = 1,000,000 cubic centimeters; 1 kilogram = 1,000 grams) Read the Full Article »