The Birkana hexadecimal number symbols
Fun fact: you can count to hexadecimal on the fingers of one hand.<p>The way it works is that each of your four fingers has four well-defined places on them: the three joints, plus the tip. You use your thumb to point at one of these. The first finger represents 1-4, the second 5-8, the third 9-12, the fourth 13-16. You count up and down by moving your thumb.<p>Also, because you use the thumb of the same hand for pointing, you can count two different hexadecimal numbers if you use both hands --- which means you can count to 256.<p>(I don&#x27;t know anybody limber enough to do this with their toes.)<p>As a special bonus: if you point to the fleshy pads of the fingers instead of the joints, you can use the same system for base 12.