Answers

2015-04-20T20:15:26+05:30
There can be many answers but the basic idea is using factorial. Factorial is the product of all the numbers from 1 to that number. For example 4! = 1 x 2 x 3 x 4 = 24.
 
So, 3! + 11 + 13  = 30
Similarly you can find many such answers.

Hope that helps !!
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2015-04-21T14:00:22+05:30
It is it is impossible to get answer in even number by adding odd number. 
But it can do by factorial method.
3! + 15 + 9 =30
3! + 11 + 13 = 30 
3! = 1*2*3 = 6
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