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Today is Day 217 of 2015

217

217 modulo 712 = 217 - G. Sarcone
is a centreed hexagonal number, and a Kaprekar constant in base 2.

= 1 + 2 + 4 + 5 + 10 + 20 + 25 + 50 + 100 (sum of the factors of the number 100)
= 13 + 63 = (- 8)3 + 93 (sum of cubes)

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




217

Today is day number   of 2015. Below are various representations of the number 217, 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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