Quantitative comparison question

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Discus: SAT/ACT Tests and Test Preparation: July 2004 Archive: Quantitative comparison question
By Etsrep78328 (Etsrep78328) on Monday, July 19, 2004 - 08:01 am: Edit

Compare the following two quantities:
Column A -- The greatest prime factor of 7^30
Column B -- The greatest prime factor of 8^30

(A) Column A is greater
(B) Column B is greater
(C) Both quantities are equal
(D) Relationship cannot be determined from the information given

By Optimizerdad (Optimizerdad) on Monday, July 19, 2004 - 08:30 am: Edit

For 7^30, the only prime factor is 7; for 8^30, it's 2.
Answer is (A)

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