Today’s challenge is deceptively simple—hidden among a crowd of adorable white seals is a single marshmallow. Sounds easy?

Each may require different numbers of moves. Some people prefer to solve the outer parts of the puzzle first. To solve the puzzle, decide where you want a tile to go, and imagine a loop that ...

Only someone with a high IQ can solve the math puzzle in 5 seconds. Are you one of them? Go ahead and test your intelligence now!