Exercise your brain with complex and difficult mathematical problems. The Master of Mental Mathematics promotes mental arithmetic and the power of concentration. Try it and you will see, your brain will thank you.
- Square root
- the sum
(4.1 and up)
Jelly Bean (4.1 - 4.3.1),KitKat (4.4 - 4.4.4),Lollipop (5.0 - 5.1.1),Marshmallow (6.0 - 6.0.1),Nougat (7.0 – 7.1.1),Oreo (8.0-8.1), Pie(9.0)