The best thing about GMAT Number Properties problems is that the numbers are nice and easy. There’s no need to worry about fractions, decimals, or percents! Read more

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Welcome to the 2^nd installment of our dive into Number Properties. If you haven’t yet tried the first problem, start with the first article in the series.

Let’s dive right into our second problem from the GMATPrep® free exams: Read more

Most of my students are driven crazy by GMAT Number Properties. On the face of it, the topic seems straightforward: I know what positive and negative, odd and even are. Divisibility stuff is a little more complicated, but come on: this was taught in school when we were 10! How hard can it be? Read more

What are number properties? This concept covers things that we often call basic “ topics that we learned in middle school (or earlier): divisibility, factors and multiples, odds and evens, positives and negatives, and so on. It’s also true, though, that this material can become quite complex. For example, fundamental counting principles are included in number properties, and the more complex problems of this typeare something called Combinatorics which most of us hate. = ) In addition, we’ve all come up against very challenging problems testing a supposedly “simple” concept, such as divisibility.

We face two big challenges in dealing with number properties:
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