Senary (base 6) is a number system that uses 6 digits (0, 1, 2, 3, 4 and 5). Examples are 12 in senary is 20 and 35 in senary is 55. And in senary, when it reaches 5, it will not be 6 because 6 is not in the senary system, so you add a 1 in front and 0 on everything else.[1][2]
0 = 0
1 = 1
2 = 2
3 = 3
4 = 4
5 = 5
6 = 10
7 = 11
8 = 12
9 = 13
10 = 14
11 = 15
12 = 20
13 = 21
14 = 22
15 = 23
16 = 24
17 = 25
18 = 30
19 = 31
20 = 32
Binary (Base 2)
Ternary (Base 3)
Quaternary (Base 4)
Quinary (Base 5)
Septenary (Base 7)
Octal (Base 8)
Nonary (Base 9)
Decimal (Base 10)
Hexadecimal (Base 16)
Vigesimal (Base 20)