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.

For all positive integers m, [m] = 3m when m is odd and [m] = (1/2)*m when m is even. What is [9]*[6] equivalent to?

For all positive integers m, [m] = 3m when m is odd and [m] = (1/2)*m when m is even. What is [9]*[6] equivalent to? A. [81] B. [54] C. [37] D. [27] E. [18] Correct Answer: D Full explanation coming soon. Send us a note if you’d like this added to the express queue! […]

For all positive integers m, [m] = 3m when m is odd and [m] = (1/2)*m when m is even. What is [9]*[6] equivalent to? Read the Full Article »

Is x > 1?

Is x > 1? (1) (x+1)(|x|−1)>0 (2) |x|<5 A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient. B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient. C. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient. D. EACH statement ALONE is sufficient. E. Statements (1)

Is x > 1? Read the Full Article »

A thin piece of wire 40 meters long is cut into two pieces. One piece is used to form a circle with radius r, and the other is used to form a square. No wire is left over. Which of the following represents the total area, in square meters, of the circular and the square regions in terms of r?

A. π∗r^2 B. π∗r^2 + 10 C. π∗r^2 + 1/4∗π^2∗r^2 D. π∗r^2 + (40−2π∗r)^2 E. π∗r^2 + (10−1/2π∗r)^2 Here’s another tough geometry question from the GMAT Prep tests 1 and 2. This one comes up a lot in GMAT tutoring sessions even with people excelling on the quant side. Why? People speed through the initial

A thin piece of wire 40 meters long is cut into two pieces. One piece is used to form a circle with radius r, and the other is used to form a square. No wire is left over. Which of the following represents the total area, in square meters, of the circular and the square regions in terms of r? Read the Full Article »

In the rectangular coordinate system above, the area of triangular region PQR is

In the rectangular coordinate system above, the area of triangular region PQR is (A) 12.5 (B) 14 (C) 10√2 (D) 16 (E) 25 Correct Answer: A 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,

In the rectangular coordinate system above, the area of triangular region PQR is Read the Full Article »