Everyday we use the decimal number system (base-10); however, some programmers sometimes represent numbers using the octal number system (base-8).
The following is an old math joke...Dec 25 = 31 Oct
MathBabbler wrote the following on a classroom whiteboard on 31 October 2011.
After looking at the picture later, he wished he written 5x1 instead of 1x5.
Creator: Gerald Thurman
Created: 25 December 2011