## Square Number

If a number is multiplied by itself, the product so formed is called the square of that number.

If ‘a’ is a number then the square of a is written a^{2 } and is given by

a^{2 } = a x a.

Example: 3 × 3 = 9, we say that 9 is the square number of 3.

### Other examples of square numbers

- 1 × 1 = 1
^{2}= 1, we say that 1 is the square number of 1. - 2 × 2 = 2
^{2}= 4, we say that 4 is the square number of 2. - 4 × 4 = 4
^{2}= 16, we say that 16 is the square number of 4. - 5 × 5 = 5
^{2}= 25, we say that 25 is the square number of 5.

**Thus, the square of a number is a number raised to the power 2.**

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