Raidho

 
הצטרף: 14/07/2016
I never saw a wild thing sorry for itself...
נקודות36עוד
Next level: 
Points needed: 164
Last game
9 Ball Pool

9 Ball Pool

9 Ball Pool
לפני 6 שנים 180 ימים

Mental calculation

Nikolay Petrovich Bogdanov-Belsky. Mental calculation. In the public school of S.A. Rachinsky (1895).

231011962

No calculators. No paper. No pens. Only own wits.
A rural Russian school. The late XIXth century.
Is it too much for you?