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Source: Official Guide Revised GRE 1st Ed. Part 8; Section 5; #1


O is the center of the circle above.

O is the center of the circle above. Quantity A : x Quantity B : 5 Quantity A is greater., Quantity B is greater., The two quantities are equal., The relationship cannot be determined from the information given.

4 Explanations


Is this an example of the 3 - 4 - 5 rule? Is that why Chris didn't necessarily have to show how to calculate it to get 5 (i'm guessing via the Pythagorean Theorem) because you can look at it and automatically recognize it's a 3 - 4 - 5 Rule and no calculation is needed?

Jan 21, 2019 • Comment

Sam Kinsman

Yes, that's right! :D

Jan 23, 2019 • Reply


Sofia Ababou

Instead of finding out the value of x, can we just think : " Hey the radius is 5 and X is less than 5 because its end point is not on the circle, and therefore it must be less than the value of the radius" ?

Nov 8, 2016 • Comment

Sam Kinsman

Yes, that's right! :D

Nov 11, 2016 • Reply



@Anwar Alharbi pg.330

Jul 11, 2014 • Comment


Chris Lele

Oct 11, 2012 • Comment

anwar alharbi

Where is the question in the book? I have been trying to find it in the 2nd edition of the book[ the official guide to the GRE]

Sep 7, 2013 • Reply

Where can i find the questions for these videos???

Aug 21, 2015 • Reply

Jonathan , Magoosh Tutor

These questions are from the Official Guide to the Revised GRE, which is published by ETS. We recommend including this source in your GRE preparation!

Aug 31, 2015 • Reply

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