##### Multiples of 10

There are different approaches to organizing numbers, based on the quantities they are grouped in. Modern numbering is based on multiples of 10 and is an example of a 'base 10' numbering system.

##### Other Based Numbers

In addition to base 10 numbers, numbers are also commonly grouped in units of 1, 12 and 60. Each group size is the ‘base’ for that numbering method.

The modern 'Hindu-Arabic' numbering system that is widely used is a base 10 system. It is also a positional numbering system – the position of digits relative to one another is important to their value. This system combines 1-9 characters from the Arabic numbering system, with the addition of 0 'zero' from India to act as a placeholder.

With modern numbering, a number is made up of individual digits. Each digit can have a different value (0-9). A digit's value and position relative to other digits in the number dictates its value.

The position of a digit defines its value (how many times it is multiplied by 10.) Modern numbering is a positional system. Each digit to the right increases the value by a magnitude of ten, with zero acting as a placeholder when a digit has no value.

**Each digit represents to the left represents and increase by a magnitude of 10:**

Like the modern numbering system, hieroglyphic numbers were also a base 10 numbering system…