Photo credit: http://roomrecess.com
The game Zap-A-Zoid, is a great way for students to learn about odd & even numbers, multiples, factors, and prime numbers. To begin, they read what their goal is at the bottom of the screen, and then they fire an energy bolt at the alien with the correct number above its head. This game can be played on a computer or a tablet.
Disclaimers: There is shooting involved in this game. Lastly, this game requires Flash.