Math · Topic 17 of 124
Square Numbers
⭐ MasteredA square number is a number multiplied by itself. 5 × 5 = 25, so 25 is a square number.
💡 Fun fact
1, 4, 9, 16 and 25 are the first square numbers.
All about Square Numbers
A square number is made by multiplying a whole number by itself.
Square numbers get their name from the shape they make. Arrange 16 dots in four rows of four, and they form a perfect square.
🎮 Try it yourself!
Loading…
👀 What the animation shows
This animation shows dots arranged into squares. Watch how the squares grow from 1 by 1 to 2 by 2 to 3 by 3, and how the number of dots is always a square number.
Real-life uses of Square Numbers
- Finding the area of a square room
- Making square tiles or garden beds
- Solving puzzles where numbers are arranged in a grid
Frequently asked questions about Square Numbers
What is 12 squared?
144, because 12 × 12 = 144.
What is the square root of 81?
9, because 9 × 9 = 81.
Is 50 a square number?
No. It is between 49 (7 × 7) and 64 (8 × 8), so it is not a perfect square.