Answer
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 \[\left( {{2}^{5}}-1 \right)\]using the fingers of a single hand, or from 0 through 1023 (210−1) if both hands are used.
Finger binary gives you a much greater range of numbers, and which makes multiplication particularly easy.
Hence, finger binary is a system for counting binary numbers
