## January 2019 Fiendish Function

The Fiendish Function posed during January 2019 had the following sample guesses and replies:

- 1
- 1
- 2
- 2
- 3
- 6
- 4
- 42
- 5
- 21
- 10
- 88263

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

Suppose the guess was 12:

- Find 12 x 11 x 10 x 9 x 8 x 7 x 6 x 5 x 4 x 3 x 2 x 1, giving 479001600.
- Reverse the order of the digits, giving 6100974.

So the result is 6100974.

## Earlier answers

Here are the answers to the Fiendish Functions posted in earlier months: