Training and solving of the math tasks against the time is a basis of mind training methodology.
+ Game rules
Look at equation. Solve whether it is true or false.
+ Game modes.
– Solve as much equations as you can in particular time.
– Solve equations as fast as you can.
– Solve equations against the time infinitely.
Constant mind training is a way to prolong you life and to make grey matter stay tuned.
Improve you solver mastery.