November 2016 Fiendish Function

The Fiendish Function posed during November 2016 had the following sample guesses and replies:

  • GUESS
  • REPLY
  • 1
  • 1
  • 2
  • 8
  • 3
  • 72
  • 4
  • 46
  • 5
  • 521
  • 10
  • 1

The rule was: "Cube the number, then reverse the order of the digits".

Suppose the guess was 13:

  • Cube the number, giving 2197.
  • Reverse the order of the digits, giving 7912.

So the result is 7912.