Finger binary Finger binary Finger binary is a system for counting and displaying binary numbers on the fingers of one or more hands. It is possible to count from 0 to 31 (2−1) using the fingers of a single hand, or from 0 through 1023 (2−1) if both hands are used. In the binary number system, each numerical digit has two possible states (0 or 1) and each successive digit represents an increasing power of two. Note: What follows is but one of several possible schemes for assigning the values 1, 2, 4, 8, 16, etc. to fingers, not necessarily the best.
Roman numerals 10=(,) and results from either crossing of the thumbs, or holding both hands up in a cross. Another possibility is that each represents a finger and represents the thumb of one hand. This way the numbers between 1–10 can be counted on one hand using the order: =P, =PR, =PRM, =IT, =T, =TP, =TPR, =TPRM, =IN, =N (P=pinky, R=ring, M=middle, I=index, T=thumb N=no fingers/other hand). This pattern can also be continued using the other hand with the fingers representing and the thumb . A third hypothesis about the origins states that the basic ciphers were , , and (or )