Square Numbers
Square numbers are the result of multiplying a whole number by itself, and they can be arranged into perfect square dot patterns.
What You Need to Know
Key Concept Diagram
A square number is made by multiplying a whole number by itself (e.g. 3 × 3 = 9)
Square numbers can be shown as square arrays of dots
The first five square numbers are 1, 4, 9, 16, 25
The notation n² means "n squared" (e.g. 4² = 16)
Key Vocabulary
Square number
The result of multiplying a whole number by itself (e.g. 5 × 5 = 25)
Squared
Multiplied by itself; written using the exponent 2 (e.g. 6² = 36)
Array
An arrangement of objects in equal rows and columns
Perfect square
Another name for a square number — its square root is a whole number
Knowledge Check
Select the correct answer for each question. Click "Check Answer" to see if you are right.
Question 1
What is 7 squared (7²)?
Question 2
Which of the following is a square number?
Question 3
How many dots would be in a square array for the square number 16?
Key Concepts Summary
- ●A square number is made by multiplying a whole number by itself (e.g. 3 × 3 = 9)
- ●Square numbers can be shown as square arrays of dots
- ●The first five square numbers are 1, 4, 9, 16, 25
- ●The notation n² means "n squared" (e.g. 4² = 16)