Human and computers have different ways of identifying , counting and manipulating a number .

Identifying and counting a number by human varies from simple to complex

Suppose you are to find the total numbers of students in a class, you start by counting 1 ….. n and not n …. 1

Simply because , the the last number ( n ) of the student is unknown. Similarly computers have a specific way of identifying, counting and manipulating number

Four types of computers numbers

- Decimal
- Binary
- Octary
- Hexa decimal

In this post , I will be explaining the basic applications and ways of manipulating these numbering in every day activitie

## System Number Table

```
Number Type Values Base
Decimal : 0 ... 9 | base of 10
Binary : 0 and 1 | base of 2
Octary : 0 - 7 | base of 8
Hexa decimal : 0 ... 9 - A ... F | base of 16
```

### FIRST 20 SYSTEM NUMBERS

```
Decimal Binary Octary Hexa Decimal
1 0
2 10
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
```

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