Answers

2015-07-14T22:58:47+05:30
The sum of three odd numbers gives an odd number
So, the sum of 3 given odd numbers doesn’t results 30
So, it is an impossible factor
here we can't use 3! too
because 3! [3×2×1] results a even number 6
so we can’t use it.
If there will be an allowance of factorials, then the answers will be
3!+1+5+7+11=30
3!+1+3+7+13=30
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2015-07-16T16:33:30+05:30
7+3+11+9=30

this is one way. 
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