Maths dictionary
What is a composite number?
A composite number is a whole number greater than 1 that has more than two factors, so it is not prime.
Definition
A composite number is a whole number greater than 1 that has more than two factors, so it is not prime.
Example
12 is composite: its factors are 1, 2, 3, 4, 6 and 12.
Tip
Every composite number can be written as a product of primes, such as 12 = 2 × 2 × 3.
Practise it
- Play: Prime Hunter
- Worksheets: Factors and multiples (Grade 4)
- Online maths practice
Quick check: try these
Work each one out on paper, then tap the question to see the answer.
How many factors does 14 have?
Answer: 4
How many factors does 36 have?
Answer: 9
How many factors does 12 have?
Answer: 6
How many factors does 28 have?
Answer: 6
Learn it in depth
Composite number is part of HCF and LCM for Class 6: notes, formulas, solved examples with every step, common mistakes and ten practice questions with answers. Want a teacher to go through it with you? See Class 6 maths tuition.
Related words
FAQ
Composite number: questions
What is a composite number?
A composite number is a whole number greater than 1 that has more than two factors, so it is not prime. 12 is composite: its factors are 1, 2, 3, 4, 6 and 12.
What is a common mistake with composite number?
Every composite number can be written as a product of primes, such as 12 = 2 × 2 × 3.
Where do students learn composite number?
HCF and LCM is usually taught in Class 6, and the ideas come back in later classes. Chapter names and order differ by board and textbook, so follow your own textbook. We have a full page with notes, solved examples and practice questions.
Play it, don't just read it
Try it now: Profit and loss
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Profit and loss (Grade 7): Finding profit or loss as a percentage of the cost price, and the selling price after a gain or loss. Open the practice page or print a worksheet.
Or play a game
- Percent PowerPractise finding percentages of amounts and understanding percentage…Play
- Prime HunterTap every prime, square, multiple or factor hidden in a grid of numbers.Play
- Number SequencesSpot the pattern and type the next number. Add, multiply, squares,…Play