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.
Richard J. Trudeau, Dots and Lines
Maths is your friend
If you meet with him every day, he becomes your best friend.
If you leave for a time he forget you and you forget him.