Actually, if you're willing to do real acrobacy with your fingers, you may note that each of your fingers is made of three parts, each of which can be either open or closed. So each finger can meaningfully hold 3 bits not 1. That gives you 30 bits summing over the two hands. You can also add two bits which stem from the way you show your hands (which face). You now have 32 bits. Add to that 3 different combinations of the curvature of your wrist (straight, flexed to the inside, flexed to outside) for each of the hands.
Now you have 3^2 * 2^32 = 4 294 967 305 different states you can encode which means that you can count more than have the population on earth. Getting your hands close together or far apart will give you yet another bit. So now if you are making a concert and invite every one on Earth to watch it, you will be able to count them all on your fingers and have plenty of room still.
A bit too far fetched, but still theoretically possible. : )
Just a simple question, since every finger does contain difference value (not as usual every finger has value of 1), so how u do arithmetic operation, addition n substraction...let say 2+2, or 47 + 23 as example...
I learned this when I was a kid, and practiced it to the point where I could cycle through the numbers with either hand almost without thinking. Initially just as a novelty, but in adult life I have actually come across a lot of situations where it is really useful to be able to store 5-bit numbers physically without pen and paper:
Counting elapsed times that run over midnight (or midday if you use a 12 hour clock) by reciting the names of the hours "8 o'clock, 9 o'clock ... 2 o'clock, 3 o'clock" while counting the hours with a hand.
Recalling all the elements of a set and counting the elements that meet some criteria (like remembering who you invited to your birthday party and counting if they are vegetarian or if they don't drink alcohol).
Positional counting marks an important step on from tallying or one-for-one counting, since it allows us to represent the many with a few, in this case 31 with 5, or even 1003 with 10. A simpler way in which fingers might have historically come to be used in positional counting and not just tallying involves hand prints (seen on cave walls round the world). On a flat surface put a small pebble between the thumb and forefinger of a hand print, that represents 1. Move it to between the forefinger and middle finger, that's 2. Move it on to between the middle and ring finger, that's 3. And between ring and pinkie is 4. To get 5 leave the pebble where it was and put a second pebble between thumb and forefinger again. Keep on moving and adding like this, and when all four gaps between fingers are occupied, we have 10. We're relying on the fact that 1+2+3+4=10. Instead of hand prints you can use any device with 4 obvious places or spaces, and the simplest I can think of is a cross-hair grid still with us as the + sign. (A 9-space grid is still with us as #.)
Actually, you can count still higher if you can leva your finger in half. In this case, we could go all the way until 2*3^10 instead of 2^10. However, it is pretty hard to do what I said and, after counting until 54, my fingers began hurting a little.
you coul also count until 2^11+2^10 if, when completed 2^10, you move an arbitrary finger to some side, as a reminder that you have 2^10. Don't leave it unfolded, just partially. When achieving more 2^10, open it compretely
As a low brass player in a symphony orchestra, I routinely need to count hundreds of bars of rests at a time. I actually taught myself this counting method, with the variation that the pointer finger is one, middle is two, and thumb is 16 (it's a more natural movement that way). There is the added bonus that most musical phrases are in powers of two (think of 8-bar or 16-bar phrases), so the big flips usually line up with a rehearsal mark. No more of this "am I at 30 or 35?" malarky.
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