Answers to Your College Questions

Test Question of the Month

Posted by Dr. Gary Gruber on Thursday, 16 January 2014 in Test Prep

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Can you answer this SAT math question? Check out Gruber’s Complete SAT Guide 2014 for more practice problems like this!

Two wheels have diameters of 12 inches and 18 inches, respectively. Both wheels roll along parallel straight lines at the same linear speed until the large wheel has revolved 72 times. At this point, how many times has the small wheel revolved?

(A) 32
(B) 48
(C) 72
(D) 108
(E) 162

Did you answer correctly? Click here to find out.

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Dr. Gary Gruber

Dr. Gary Gruber is nationally recognized as the leading expert on the SAT, ACT, test-taking methods, and critical thinking skills. His methods have been used by PBS, Sylvan Learning Centers, and school districts, as part of MyMaxScore’s online SAT and ACT diagnostic tests, and as the central college prep products in the test-prep area of College Countdown. His books on test taking, test preparation, and critical thinking skills have sold more than seven million copies. Dr. Gruber’s strategies have helped provide measurably improved results in test prep for the SAT, ACT, PSAT/NMSQT, and GRE tests, among many other standardized tests across all age ranges.

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