Brain Teaser

Practice problems for Brain Teaser

• Mental Math: 39 x 41
• 12-Ball Weighing Problem
• Find the Heavier Ball in 12 with Minimum Weighings
• Three Light Switches and Three Bulbs
• Water Jug Puzzle: Measuring 4 Gallons
• Private Average Salary Calculation
• Ten Prisoners Hat Puzzle - Parity Strategy
• Two Egg Problem: Minimum Worst-Case Drops
• Airplane Boarding: Last Passenger's Seat