Welcome to your daily brain workout! Today’s puzzle will stretch your logical thinking. Ready?

🧩 Today’s Puzzle: The Counterfeit Coin

You have 12 identical-looking coins. One is counterfeit — it’s either slightly heavier or slightly lighter than the others (you don’t know which). You have a balance scale. Can you find the counterfeit coin in just 3 weighings, AND determine whether it’s heavier or lighter?

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💡 Hint

Start by weighing 4 vs 4. The tricky part is what to do if they balance (the counterfeit is in the remaining 4) vs. if they don’t balance (the counterfeit is in one of the 8 on the scale).

📅 Yesterday’s Puzzle (18 June 17) — Answer

Puzzle: The Poisoned Wine — 1,000 bottles, 1 poisoned, 10 prisoners, 24 hours.

✅ Answer: Use binary encoding. Number bottles 0-999. Each prisoner drinks from bottles where their bit = 1. After 24 hours, the binary pattern of dead prisoners = the poisoned bottle number. 10 prisoners = 1,024 combinations, enough for 1,000 bottles.

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