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Today is Day 63 of 2015

63

= 26 – 1
= 62 + 33
is the number of partially ordered sets of 5 elements.
is a self-reference number:
sixty three self reference

Many thanks are extended to Archimedes' Lab for their information.




63

Today is day number   of 2015. Below are various representations of the number 63, some dating thousands of years, and some very modern.

Chinese

Egyptian

Mayan

 

Babylonian

Greek

Abacus

Roman

 

Hex

 

Binary

 

Many thanks are extended to Jo Edkins for her wonderful work.

 

 



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