I have achieved a new level of geekdom by reckoning the numbers on 
Abacus #emoji. By my count, Apple's reads 108. @Emojipedia's? 12,031, 981.pic.twitter.com/KPvuEqtwR0
When in history was a 2:4 abacus ever used? 
Greeks/Romans used 1:4 counting stones. Chinese used 2:5 (for decimal or hex). Japan adopted China's 2:5 via Korea, then 1:5, then 1:4 in the modern era. Russia had 10 (middle 2 beads colored). Europe used 9 coins on a line board...
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Fascinating. I came across 2:4 examples (both pictorial and physical) when casually researching them for Emojipedia purposes, but I can't speak to their exact historicity.
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Which civilizations were known to have used the 2:4? And when? Also, which number-based system would it have originated from out of practicality (vs. artistic display)?
End of conversation
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2:4 -> base 12, it is not about history, it is about maths jokes. But thanks, I would never noticed it, lol!
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