At a picnic there were 3 times as many adults GMAT

At a picnic there were 3 times as many adults GMAT SOLUTION This question is more complicated than it needs to be, but it is simply an issue of careful substitution. Look at it this way: we need the number of men in terms of x, which would imply that we get all of the … Read More

If the recommended weight w, in pounds, for a male… GMAT

If the recommended weight w, in pounds, for a male… GMAT Data Sufficiency Question Here’s the question for you: If the recommended weight w, in pounds, for a male is given in terms of his height h, in inches, by the formula w = 4.5h − 154, how much greater is Eric’s recommended weight than … Read More

Last year the price per share of Company A’s stock — SOLUTION GMAT

Last year the price per share of Company A’s stock… is a pretty frustrating little question. That’s because this GMAT question is extra-sneaky in its wording. Make sure that you’re being careful about what is what. I personally recommend writing down all of your values relative to the original value, perhaps in a table. Last … Read More

GMAT Combinatorics: The Ultimate Guide to GMAT Factorials (also useful for Probability!)

GMAT Combinatorics: The Ultimate Guide to GMAT Factorials — the Three-Question Method If we don’t get the concept of Factorials straight, the rest of this–Permutations and Combinations, quite a lot of advanced GMAT fatoring, etc.–is never going to work. How to Think About GMAT Factorials in a Broad Sense The idea of a Factorial is … Read More

The Ultimate Guide to GMAT Geometry III: Trapezoids, Rectangles, Squares

The Ultimate Guide to GMAT Geometry, Part III: Trapezoids, Rectangles, and Squares Chapter 8: Trapezoids (Trapeziums (Trapeziae?)) in GMAT Geometry If you were paying attention to the footnotes, then you’d recognize this as the extra credit answer.  In essence, a trapezoid is sort of a dodgy parallelogram, where only two of the opposite sides got … Read More