For how many positive integer values of is a factor of ? (A) 22 (B) 23 (C) 24 (D) 25 (E) 26 This problem is a variation on a theme. You should take a look at Factors in …
Using Venn Diagrams to Solve a Combinatorics Problem
Taking the right approach is the key to most GMAT and GRE quant problems, and combinatorics problems are no different. Almost all combinatorics problems can be solved with a single tool that can be …
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Absolute Value Equations
Many students are uncomfortable with the concept of absolute value. They often think of it as some magic trick that makes everything positive. In a sense this is correct, but if that's how you think …
When to Venn
Many students rely exclusively on the double set matrix when solving overlapping sets problems, but there are many situations where the double set matrix is overkill and a Venn diagram is a more …
Scaling Circles
The area of circle is , and the area of circle is . What is ratio of the circumference of circle to the circumference of circle . (A) 2.5 : 1 (B) 5 : 2 (C) 5 : 4 (D) 25 : 16 (E) …
Do You Know Your Divisibility Rules
For which of the following values of is NOT an integer? (A) (B) (C) (D) (E) [math]7[/math] …
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