Ah, the classic puzzle! Here's one way to identify the odd ball using the balance scale three times:
1. **Divide the 12 balls into three groups of four (Group A, Group B, Group C).**
2. **First Weighing:** Weigh Group A against Group B.
- If the scales balance, the odd ball is in Group C.
- If the scales tip, remember which side was heavier or lighter. The odd ball is in the group that caused the imbalance.
3. **Second Weighing:** Take the group with the odd ball (either Group A, B, or C) and divide it into two pairs.