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Base 21 to Vigesimal (base 20)

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base 21 is a positional numeral system with twenty-one as its base. It uses 21 different digits for representing numbers. The digits for base 21 could be 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, a, b, c, d, e, f, g, h, i, j, and k.

conversion table

base 21hexadecimal (base 16)base 21hexadecimal (base 16)
1= 1b= b
2= 2c= c
3= 3d= d
4= 4e= e
5= 5f= f
6= 6g= g
7= 7h= h
8= 8i= i
9= 9j= j
a= ak= 10

The vigesimal or base 20 numeral system is based on twenty (in the same way in which the decimal numeral system is based on ten).

conversion table

hexadecimal (base 16)base 21hexadecimal (base 16)base 21
1≈ 1b≈ b
2≈ 2c≈ c
3≈ 3d≈ d
4≈ 4e≈ e
5≈ 5f≈ f
6≈ 6g≈ g
7≈ 7h≈ h
8≈ 8i≈ i
9≈ 9j≈ j
a≈ a10≈ k