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Gaurav
Agrawal answered last year in UPSC very intelligently and using his imagination.

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

This question is asked so many times. We can answer this question in many ways using the factorial function.

3! + 1 + 3 + 9 + 11 = 30

1 + 5 + 7 + 3! + 11 = 30

3! + 3! + 3! + 11 + 1 = 30

3! + 3! + 11 + 5 + 1 = 30

11+ 1 + 1 + 3! + 11 = 30

15 + 3 + 3 + 3 + 3! = 30

13 + 1 + 1 + 9 + 3! = 30

13 + 1 + 3 + 7 + 3! = 30

13 + 5 + 3 + 3 + 3! = 30

perhaps there are more ways. We actually need a function or operator which converts an odd integer in to an even integer. Factorial is one such function. If there are other functions, we can use those also.

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

This question is asked so many times. We can answer this question in many ways using the factorial function.

3! + 1 + 3 + 9 + 11 = 30

1 + 5 + 7 + 3! + 11 = 30

3! + 3! + 3! + 11 + 1 = 30

3! + 3! + 11 + 5 + 1 = 30

11+ 1 + 1 + 3! + 11 = 30

15 + 3 + 3 + 3 + 3! = 30

13 + 1 + 1 + 9 + 3! = 30

13 + 1 + 3 + 7 + 3! = 30

13 + 5 + 3 + 3 + 3! = 30

perhaps there are more ways. We actually need a function or operator which converts an odd integer in to an even integer. Factorial is one such function. If there are other functions, we can use those also.