| Version 2 (Case 1) | | Rationale |
| First weighing | Put any 3 coins on either side of the scale. | If the scale balances, the counterfeit is in the 3 remaining coins. |
| Second weighing | Place 2 of the remaining coins, each on either side of the scale. | 1) If the scale balances, the counterfeit is the last coin 2)If the scale is unbalanced, the heavier side contains the counterfeit coin |
Wednesday, March 17, 2010
Version 2 case 1
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