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Disc1
| 1 | The Riddle (extended mix) | Prezioso & Marvin | 5:47 |
| 2 | The Riddle (radio edit mix) | Prezioso & Marvin | 3:22 |
| 3 | The Riddle (alternative extended mix) | Prezioso & Marvin | 5:36 |
| 4 | The Riddle (alternative radio edit mix) | Prezioso & Marvin | 3:24 |