Tag: parity

Interview Questions

• 100 prisoners guessing hat colors in a line
• Snapping a 6-by-8 chocolate bar into squares
• Grabbing coins from the ends of a row
• Five lattice points and a hidden midpoint
• Seven glasses, flip exactly four at a time
• Point to the buried key by flipping one stone
• A grasshopper that only jumps diagonally
• Everyone shouts the number of red hats, one must be right
• The last chip left in the bag
• A mouse eating a 3×3×3 block of cheese
• The number of odd-handshakers is always even
• Two children toggling a row of lamps
• Will two wandering friends ever stand together?