Simple but surprisingly difficult! What?
Let's make "10" with 4 numbers!

【how to play】
Four numbers displayed on the screen are displayed,
Using addition (+) and subtraction (-),
Let's set the calculation result to "10".

【Method of operation】
· Tap 4 panel of numbers, "+" panel, "-" panel.
· If you made a mistake, tap "Reset" button.

【Game mode】
· "1 minute challenge"
It is a mode to challenge how many questions can be answered per minute.

· "Time Attack"
It is a mode to answer 10 problems as soon as possible.