number properties

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Source: — Data Sufficiency |

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by neelgandham » Thu Jan 12, 2012 9:10 am
n=?
1). The tens digit of 11^n is 4
n can be 4 or 14 or.. Insufficient!
2). The hundreds digit of 5^n is 6
n can be 4 or 14 or.. Insufficient!

IMO E

Can you please provide the source of the question ?
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by sam2304 » Thu Jan 12, 2012 9:18 am
IMO E. Arrived at the same conclusion but used a calculator to check for 11^14. Too tough to be a GMAT question and if anybody has got a shortcut to solve this, it would be more helpful.
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