Another stupid philosophical point of vue.

Difficulty: 3.5/10

Clue: A mod 9 = 0
          where A = any number found in the drawing.

Size: A3 - 297mm x 420mm

Did you know that:

- The arithmetic 'modulo' operator was introduced by Carl F. Gauss at the beginning of the XIXth Century. Familiar uses of modular arithmetic include the 12-hour clock, computing, ...

- The Braille system, a method widely used by blind people, originally developed by Charles Barbier and revised by Louis Braille, is a system representation of alphanumerical characters.
A rectangle may contain up to 6 dots (2 rows of 3 dots) and therefore allow to represent in the simplified form up to 64 alphanumerical characters (2^6).
This can be seen as a binary encoding scheme.

- Fibonacci number (Filius Bonaccio number) was well know in ancient india more than 1000 years before Fibonacci was born. This sequence of numbers was applied to their metrical sciences.