I'm a sucker for math apps. Anything that gets my kids to practice math makes me happy, but one where they are determined to beat my score gets chalked up as a win in my book. At first look, I had my reservations about 1+2=3. I mean how basic can a math app get? Almost an hour later, I realized just how fun and challenging this game can be. The premise is simple — a math equation is displayed on the screen. The answer is either 1, 2 or 3. Players must rapid-fire select the correct answer as the equations get more complex and the time gets faster.