There is a distinction between Numbers And Numerals.
A Number is concept &
A Numeral is its representation.
Different Numerals can be used to represent the same Number
For Example a number 12 can be expressed/represent as following numerals:
2 × 6,
4 × 3,
10 + 2,
8 + 4,
20  8,
30  18
24 ÷ 2
36 ÷ 3
So all the above Numerals represent the same Number 12.
