Sirvo's Threes is easy to learn but challenging to play. The object is to slide numbered tiles to combine them into multiples of three to run up your score before the screen fills with new tiles. Rare tiles are better than high scores. The game tests your math skills and mental quickness, but it's also fun. Threes for Android costs $0.99.
Easy to play: The brief tutorial that opens Threes almost isn't needed, once you know the basic concept.
Math quiz: Threes makes math easy and fun. Playing Threes will tune up your math skills, too.
Cute emoji: The tiny emoji faces at the bottom of each tile give some personality to a decidedly left-brain experience. Each character has its own voice and reacts to pairings.
Triumph singlehandedly: You can play Threes with one hand, and the tiles are large enough to read at a distance: Perfect for playing on the go.
Hard to master: Playing Threes can get frustrating if you start hurrying or get flustered. There is a learning curve here despite how easy the basic concept and gameplay are to grasp.
Threes is basic in concept and execution and fun to play. The math it uses is elementary, but the game is still challenging.