Senary

This is a positional system based on the powers of 6 and the notation consists of digits 0-5. Even though it is not widely used in everyday life, some of its properties make it useful in maths, for example in calculating fractions which have 2, 3 or 6 in the denominator.

Table on the right shows how fractions in the decimal system (left column) differ from the ones in senary system (right column)