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# In the figure above, points P and Q lie on the circle with center O. What is the value of s?

A. 1/2

B. 1

C. √2

D. √3

E. √2/2

Statistically this is a challenging GMAT question. A lot of people get it wrong. However, it’s not all that tough. And if you’re gunning for a top shelf GMAT score then better get it right! You need to excel at these statistically tough but actually easy questions. How? Stay organized Don’t make assumptions. With those two things you avoid most GMAT traps. In this circle question most people assume that the figure (the baseball field) is exactly split by the y axis so that the value of s is equal to √3. Is it? Nope. Most GMAT diagrams are drawn to scale but that doesn’t mean that they aren’t misleading. Don’t assume symmetry just because a figure looks symmetrical. It could be .00000001 off. Now, let’s not get paranoid. That doesn’t mean straight looking lines might be curved. Still: avoid making assumptions.

Let’s start organizing this diagram by creating triangles. We can create two tidy right triangles on each side. You can find a video explanation here: In the figure above, points p and q lie on the circle with center O. What is the value of s? 