Answer:
Explanation:Base 10 (Decimal) — Represent any number using 10 digits [0–9]
Base 2 (Binary) — Represent any number using 2 digits [0–1]
Base 8 (Octal) — Represent any number using 8 digits [0–7]
Base 16(Hexadecimal) — Represent any number using 10 digits and 6 characters [0–9, A, B, C, D, E, F]
In any of the number systems mentioned above, zero is very important as a place-holding value. Take the number 1005. How do we write that number so that we know that there are no tens and hundreds in the number? We can’t write it as 15 because that’s a different number and how do we write a million (1,000,000) or a billion (1,000,000,000) without zeros? Do you realize it’s significance?
First, we will see how the decimal number system is been built, and then we will use the same rules on the other number systems as well.
So how do we build a number system?
We all know how to write numbers up to 9, don’t we? What then? Well, it’s simple really. When you have used up all of your symbols, what you do is,
you add another digit to the left and make the right digit 0.
Then again go up to until you finish up all your symbols on the right side and when you hit the last symbol increase the digit on the left by 1.
When you used up all the symbols on both the right and left digit, then make both of them 0 and add another 1 to the left and it goes on and on like that.
If you use the above 3 rules on a decimal system,
Write numbers 0–9.
Once you reach 9, make rightmost digit 0 and add 1 to the left which means 10.
Then on right digit, we go up until 9 and when we reach 19 we use 0 on the right digit and add 1 to the left, so we get 20.
Likewise, when we reach 99, we use 0s in both of these digits’ places and add 1 to the left which gives us 100.
So you see when we have ten different symbols, when we add digits to the left side of a number, each position is going to worth 10 times more than it’s previous one.