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2015-03-05T15:09:01+05:30

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All the numbers provided to solve the question are odd numbers. Three odd numbers can not give even number as answer when added. So you can not get 30 as answer in the above question. 
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2015-03-06T20:16:16+05:30

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Odd numbers don't add up to give you an even number.
It is possible only in case of factorial.

3!+1+3+13+7=30 

3!+3!+3!+3!+3!=30

11+1+3+15=30

3! + 15 + 9 = 30
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