A quick math game that uses creative thinking and reasoning. This game needs at least two players, but can be played as a whole class.
Player 1 thinks of a number (3 digit numbers work best, but add more digits to make it more challenging.) Another player takes a guess at the number. Player 1 then writes the guess, how many digits they got correct, and how many are in the right place. This will give the next person who guesses clues to the correct number!
This can also be played any time you have a few extra minutes by drawing the chart on a white board.