Question

Which game isn't fair for two players to play?

A number cube is rolled. Player 1 gets a point for the numbers 3 or less, and player 2 gets a point for the numbers 4 or higher.
A coin is flipped. Player 1 gets a point for heads side up, while player 2 gets a point for tails side up.
A number cube is rolled. Player 1 gets a point for an even number, and player 2 gets a point for an odd number.
A number cube is rolled. Player 1 gets a point for any number that is 3 or higher, and player 2 gets a point for any number less than 3.