March 2015 Fiendish Function
The Fiendish Function posed during March 2015 had the following sample guesses and replies:
- 1
- 1
- 2
- 2
- 3
- 3
- 4
- 3
- 5
- 4
- 10
- 7
The rule was: "Write the number in binary, write it in binary, then add the digits together".
Suppose the guess was 22:
- Write the number in binary, giving 10110.
- Write the number in binary, giving 10011101111110.
- Find the number's digits, giving 1, 0, 0, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 0
- Add these together, giving 10.
So the result is 10.
Earlier answers
Here are the answers to the Fiendish Functions posted in earlier months: