Square Numbers
Maths: Edexcel IGCSE Higher, topic 1.4.1
Square Numbers
You can get a square number by multiplying any number by itself.
Examples
- 1 × 1 = 1
- 2 × 2 = 4
- 3 × 3 = 9
- 4 × 4 = 16
- 5 × 5 = 25
- Etc.
Multiplication square
- These are the numbers that go diagonally down the middle of a multiplication square.
Notation
- You write squared by using a 2 to the right of any number.
- 12 = 1 × 1
- 22 = 2 × 2
- 1002 = 100 × 100
- Etc.
Uses of square numbers
- Square numbers are used in all areas of maths.
- One way in which they are used is to find the area of squares.
- The area will be the square of the side length.
Test yourself on Square Numbers
Which of these numbers is a square number?
Which of these numbers is NOT a square number?
What is 52 the same as?
Which of these numbers is a square number?