Why do we group numbers by 10

Best base is 12. Far more factors than 10 (or 30): 1,2,3,4,6 &12. Base 12 is much more efficient than base 10 for everyday human computation.

base 12 master race reporting in
en.wikipedia.org/wiki/Duodecimal

but not really, it's too late to change anything now :/

Dozenal master race reporting.
You can even count to 143 on your hands using the 3 segments of each of your four fingers.

You can count to 1023 using binary with just whole fingers up and down

t. someone who hasn't looked at their thumbs lately

it just works

>not being unidecimal masterrace

We sort eggs in 12's

and bread in 13's

this

there have been counting systems with bases like 5 or 20. it seems to have come from the number of fingers or (toes) that ppl have