Answer :
Gaurav Agrawal answered very intelligently and using his
imagination. -- really for this question is
asked so many times.. all credit goes to him.
you can answer this question in many ways using the factorial function.
3! + 3! + 3! + 3! + 3! = 30
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
If one can use /, * , exponent and other operators, then you can get more answers too. Question does not say anything about the operators.
5 * 3 + 13 + 1 + 1 = 30
13 + 15 + 3! - 3 - 1 = 30
15! / 13! / 7 * 1 * 1 = 30
5! / 3! + 1 * 3 + 7 = 30
7 * 5 - 3 - 1 - 1 = 30
9 * 7 / 3 + 9 * 1 = 30
3³ + 1 + 11 - 13 * 1 = 30
5³ / 15 * 3 + 5 * 1 = 30
3 * 15 - 11 - 3 - 1 = 30
======================================================
You need one operator for which the result is an even number with an input being an odd number. Factorial is one. Probably there are other operators too.
you can answer this question in many ways using the factorial function.
3! + 3! + 3! + 3! + 3! = 30
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
If one can use /, * , exponent and other operators, then you can get more answers too. Question does not say anything about the operators.
5 * 3 + 13 + 1 + 1 = 30
13 + 15 + 3! - 3 - 1 = 30
15! / 13! / 7 * 1 * 1 = 30
5! / 3! + 1 * 3 + 7 = 30
7 * 5 - 3 - 1 - 1 = 30
9 * 7 / 3 + 9 * 1 = 30
3³ + 1 + 11 - 13 * 1 = 30
5³ / 15 * 3 + 5 * 1 = 30
3 * 15 - 11 - 3 - 1 = 30
======================================================
You need one operator for which the result is an even number with an input being an odd number. Factorial is one. Probably there are other operators too.