May 2015 Fiendish Function
The Fiendish Function posed during May 2015 had the following sample guesses and replies:
- 1
- 1
- 2
- 8
- 3
- 9
- 4
- 10
- 5
- 8
- 10
- 1
The rule was: "Cube the number, then add the digits together".
Suppose the guess was 12:
- Cube the number, giving 1728.
- Find the number's digits, giving 1, 7, 2, 8
- Add these together, giving 18.
So the result is 18.
Earlier answers
Here are the answers to the Fiendish Functions posted in earlier months: