Pure mathematics is the world's best game. It is more absorbing than chess, more of a gamble than poker, and lasts longer than Monopoly. It's free. It can be played anywhere - Archimedes did it in a bathtub.
If there is a God, he's a great mathematician.
M4Math helped me a lot.
Thanks m4 maths for helping to get placed in several companies. I must recommend this website for placement preparations.