hard math question?

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Suyog: Master | Next Rank: 500 Posts; Posts: 315; Joined: Thu Aug 17, 2006 10:43 pm; Thanked: 23 times

by Suyog » Wed Nov 07, 2007 7:20 pm

Yes! you are right!
Ans shud be 13.
770 is product of 4 prime numbers i.e. 11, 7, 5, 2
11 + 2 = 13
Ans B.

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Source: Beat The GMAT — Problem Solving | Wed Nov 07, 2007 7:20 pm

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