Vigesimal
Vigesimal (also known as base 20) is a numeral system that uses 10 numbers and 10 letters (20 digits) : 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, F, G, H, I, J and sometimes K. Vigesimal is related to Kaktovik numerals system, because they both use base 20. Sometimes, they do not use I because I looks like a 1. Examples are 3F is 75 (3 x 20 + 15 = 75) in decimal or 8H is 177 (8 x 20 + 17 = 177) in decimal. If you reach J or K, you put a 1 in front and 0 on everything else. Vigesimal is nearly double of decimal because 40 in vigesimal is 80 in decimal and this only works if the number is between 10-90 (only if they end with 0).[1]
Numbers from Vigesimal to Decimal
[change | change source]- Left is Vigesimal, Right is Decimal
- Also the letter I is in here
0 = 0
1 = 1
2 = 2
3 = 3
4 = 4
5 = 5
6 = 6
7 = 7
8 = 8
9 = 9
A = 10
B = 11
C = 12
D = 13
E = 14
F = 15
G = 16
H = 17
I = 18
J = 19
10 = 20
Arithmetic signs
[change | change source]In vigesimal, they may use arithmetic signs to add, subtract, multiply or divide.
Addition
[change | change source]For addition, if you want to add 2 vigesimal numbers you do like this:
45 + 8C = CH (Vigesimal)
85 + 172 = 257 (Decimal)
Subtraction
[change | change source]For subtraction, if you want to subtract 2 vigesimal numbers you do like this:
DH - 8B = 56 (Vigesimal)
277 - 171 = 106 (Decimal)
Multiplication
[change | change source]And for short multiplication, if you want to multiply 2 vigesimal numbers you do like this:
1F x 6 = AA (Vigesimal)
35 x 6 = 210 (Decimal)
For long multiplication, you do like this:
5A2 x C7 = 37JEE (Vigesimal)
2202 x 247 = 543,894 (Decimal)
Division
[change | change source]And for short division, if you want to divide 2 vigesimal numbers you do like this:
5A / 12 = 5 (Vigesimal)
110 / 22 = 5 (Decimal)
For long division, you do like this:
6BG / 1CJ = 4 (Vigesimal)
2636 / 659 = 4 (Decimal)
References
[change | change source]- ↑ "Vigesimal Definition (Illustrated Mathematics Dictionary)". www.mathsisfun.com. Retrieved 2024-07-21.