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Today is Day 145 of 2015

145

is a centreed square number and also a pentagonal number.
is a product of 2 distinct primes: 5 x 29

= 1! + 4! + 5!
= 43 + 34
= 122 + 12 = 82 + 92 (sum of squares)
= (12 + 22)(22 + 52)
= 33 + 33 + 33 + 43 (sum of cubes)

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




145

Today is day number   of 2015. Below are various representations of the number 145, 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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