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sud21: Master | Next Rank: 500 Posts; Posts: 344; Joined: Sat Nov 12, 2011 3:21 amFollowed by: 2 members; Thanked: 1 times

by sud21 » Fri Jan 27, 2012 9:37 am

5^11+5^12+5^13=?

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Source: Beat The GMAT — Problem Solving | Fri Jan 27, 2012 9:37 am

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Anurag@Gurome: GMAT Instructor; Posts: 3835; Joined: Fri Apr 02, 2010 10:00 pmFollowed by: 523 members; Location: Milpitas, CA; Thanked: 1854 times; GMAT Score:770

by Anurag@Gurome » Fri Jan 27, 2012 9:41 am

sud21 wrote:5^11+5^12+5^13=?

(5^11 + 5^12 + 5^13) = (5^11)*(1 + 5 + 5^2) = (5^11)*(31)

Do the options ask for the numerical value or just the compact form?

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