Tag: invariant

Interview Questions

• The 100 lockers problem
• The 24-stone game where taking the last stone loses
• Ants falling off a rod
• Chameleons changing colors
• Snapping a 6-by-8 chocolate bar into squares
• Commuters facing off on a narrow platform
• Seven glasses, flip exactly four at a time
• A grasshopper that only jumps diagonally
• The last chip left in the bag
• A mouse eating a 3×3×3 block of cheese
• The mutilated chessboard
• The 21-coin game (take the last)
• Splitting a team and scoring the products
• Can 1×4 planks cover a 10×10 patio?