Math · Topic 17 of 65
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. 5 × 5 = 25, so 25 is a square number. The first few square numbers are 1, 4, 9, 16, 25, 36 and 49.
Square numbers get their name from the shape they make. Arrange 16 dots in four rows of four, and they form a perfect square. The square root of a number is the value that, multiplied by itself, gives that number.
🎮 Try it yourself!
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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.