What function?
Can you work out what function has been carried out on the numbers on the left to change them to the numbers on the right?
| input | function | output | ||
| 3 |  | ? | | 15 |
| 12 | | ? | | 24 |
| 7 | | ? | | 77 |
| 14 | | ? | | -1 |
| 120 | | ? | | 60 |
| 49 | | ? | | 7 |
| 23 | | ? | | -5 |
| 0 | | ? | | 17 |
Is there only one right answer? - or can you think of more than one function to give the same output?
