Answer :

ashlee

We wont get a even number if we add odd numbers an odd number of times. 

So this has to be solved using factorial-

3! + 11 + 13 = 30.This will be a solution.

tanikaray
Here you go!
3! + 11 + 13 = 30
We won't get 30 if we add them normally, So using the factorial method. You will get the answer :).

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