cross-posted from: https://sh.itjust.works/post/53581443
YSK You can count past 1,000 on your fingers by using binary, instead of just 10
With just one hand, you can count to 31, and with both hands you can reach a whopping 1,023. This is because the placement of the held up fingers matters, rather than the amount.
It can be very useful in everyday use, being able to count to huge numbers when you don’t have your phone or pen and paper nearby.
I got a nice and easy method to represent 25 numbers on one hand. You have 12 segments of the non-thumb fingers and you can hold your finger on the front or side as you go through them. Closed fist represents a zero or 25. Use two hands multiplicative to get to 600.