Idea behind modern digits is pretty simple: just count number of angles: http://mathandmultimedia.com/2013/05/23/angles-and-the-hindu-arabic-numerals/ http://ma

Idea behind modern digits is pretty simple: just count number of angles: http://mathandmultimedia.com/2013/05/23/angles-and-the-hindu-arabic-numerals/ http://mathandmultimedia.com/2013/05/23/angles-and-the-hindu...