| 1) | 12 - -3 - 0 | 2) | 4 - -2 - -8 |
| 3) | 3 + 4 + 8 | 4) | -1 - -7 - -1 |
| 5) | -4 + 5 + -21 | 6) | 4 + 6 + -6 |
| 7) | -4 - -6 - 24 | 8) | 10 - -5 - 4 |
| 9) | 11 - -8 - 23 | 10) | 1 + 8 + 17 |
| 11) | -3 + 7 + 0 | 12) | 14 - -2 - 10 |
| 13) | 1 - -3 - -13 | 14) | 10 - -10 - 19 |
| 15) | 8 - -3 - 12 | 16) | 7 + 8 + 14 |
| 17) | 7 + 9 + -8 | 18) | -9 + 9 + -9 |
| 19) | -12 - -6 - -13 | 20) | 8 - -3 - -17 |
| 21) | -8 + 7 + -9 | 22) | 4 + 3 + -10 |
| 23) | -9 - -3 - 9 | 24) | 2 - -3 - 20 |
| 25) | -8 - -3 - 18 | 26) | 9 - -1 + 1 |
| 27) | 1 + 5 + 10 | 28) | -1 + 5 + 16 |
| 29) | 11 + 7 + 23 | 30) | -7 - -3 - 18 |
| 31) | 7 - -1 + 1 | 32) | 14 - -6 - -21 |
| 33) | -8 - -9 - 9 | 34) | -3 - -7 - -13 |
| 35) | -11 + 9 + 2 | 36) | 2 - -10 - -6 |
| 37) | 7 - -1 + -14 | 38) | 11 + 6 + 11 |
| 39) | 10 - -3 - -4 | 40) | 2 + 9 + 2 |
Joke:
Terry shouted at his stubborn public-school-boy son: 'I pay thousands of pounds to your schoolmasters; but your classmates seem to be your mentors!'