logic puzzles

Practice problems for logic puzzles

• 100 Light bulbs
• 100 Switches
• 1000 Stones
• 2 Eggs
• Ant Journey
• Burning Cords
• Cheating Husbands
• Dark Room Deck
• Devil's Penny
• Door to Offer
• Duck & Fox
• Filet Mignon
• First to 50
• Fox, Chicken, and Grain River Crossing
• Grid Fill
• Heaviest Coin
• Hilbert's Hotel: One New Guest
• Knight and Knave
• Measuring 45 Minutes with Burning Ropes
• Measuring 9 Minutes with Hourglasses
• Pirate Gold Division
• Poisonous wine
• Prisoner's Hat (Binary)
• Shooting in Circle
• Ten Topping Sundae
• The Plane in the Wind
• Water & Wine
• Which Switch?
• 2 Equations & 3 Unknowns
• Illegible Dice
• Infinity & Beyond
• Min & Max
• Prisoner's Hat (multicolor)
• Rainbow Hats
• Secure Document Delivery Protocol
• Tiger and Sheep
• Arabian Sultan
• Catching the Spy
• Catching the Submarine
• Diverging Roads: Truth-Teller and Liar Puzzle
• e^Pi or Pi^e
• Finding an Anti-Terrorist Agent
• Game of Divisors
• Prisoner's Hat (Infinity)
• Pure Gold
• King's Salary
• Look-and-Say Sequence
• Poisoned Cake Identification