Question

Three odd numbers whose sum is 30

Answer 1

it cannot be as sum of 2 odd numbers is even number and sum of even and odd is odd but in question they asked  Three odd numbers whose sum is 30

Answer 2

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! + 15 + 9 =30
3! + 11 + 13 = 30