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cmal_s: Junior | Next Rank: 30 Posts; Posts: 12; Joined: Wed Mar 24, 2010 9:36 am

by cmal_s » Wed Mar 24, 2010 1:44 pm

q) What is the greatest prime factor of 4^17- 2^28.

Answer 7? HOW

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Source: Beat The GMAT — Data Sufficiency | Wed Mar 24, 2010 1:44 pm

papgust: Community Manager; Posts: 1537; Joined: Mon Aug 10, 2009 6:10 pmFollowed by: 252 members; Thanked: 653 times

by papgust » Wed Mar 24, 2010 6:13 pm

Check this link,
https://www.beatthegmat.com/greatest-pri ... 14712.html

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