XNumbers is a kind of turn-based table/math game - you may need some computing skills to win against the computer or your selected foe.
Upon startup, a table can be seen with buttons, every button has a value associated with, in a range based on the type of the table.
The goal of the game is simple - you have to gain more points to win against the opponent. Gaining points is simple, all you have to do is to select the desired button with the requested value.
Upon selection/tapping, the value of the selected/tapped button will be added to the total points of the actual player. Note that selecting negative numbers will decrease the totals.