In the settings you can increase the number range from 10 to a 100 and select the preferred operations and equation types.

The option "Allow changes in tens" is used in additions and subtractions; for example 12+2=4 and 18-3=5 do not change the ten digits but 14+8=22 and 12-3=9 do.

The option "Use funny input" gives the player moving circles with numbers to tap instead of a number keyboard.