Math Mania provides a variety of game modes including addition only, subtraction only, multiplication only, division only, algebra only, fractions only, money only, or really challenge yourself and play the everything mode!
If you want to focus on math problems with a specific number you should try the new custom mode, for example you can play custom addition. Then specify nine as the number you want to focus on. From there, every problem in the game should include a nine.
market
