BrainBashers : Number Of The Day

Today is Day 75 of 2010.

is the number of orderings of 4 objects with ties allowed.
is a repfigit number...

If you take the "digit sum" 7+5=12 and then continue adding in twos in "fibonacci style" look what happens:
7 + 5 = 12
5 + 12 = 17
12 + 17 = 29
17 + 29 = 46
29 + 46 = 75 ...arriving back at 75!

75⁵ = 19⁵ + 43⁵ + 46⁵ + 47⁵ + 67⁵

75 litres of water are needed to produce 1 glass of beer (250 ml)!

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

Today is day number of 2010. Below are various representations of the number 75, 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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