Challenge your limit of mental maths speed!

HOW TO PLAY
　Answer 30 questions as fast as possible.

FEATURE
・Various Modes
　　3 difficulty levels (EASY, NORMAL, HARD)
　　5 operations (ADD, SUB, MUL, DIV, MIX)

・World Ranking
　　You can see your ranks at a glance.

・Self Ranking
　　You can enjoy fighting with yourself.

・Simple Design
　　You can focus on questions.

・Selectable Backgrounds
　　You can change the background according to your mood.