MathsFreePrintable
Factors and Prime Numbers
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Factors and Prime Numbers
📚 Part 1: Finding Factors
1. List all the factors of 12:
2. Circle all the factors of 20:
1
2
3
4
5
6
10
20
3. Complete the factor pairs for 18:
1 × ____ = 18
2 × ____ = 18
3 × ____ = 18
4. Which number has exactly 3 factors?
6
9
12
15
🔍 Part 2: Prime Number Detective
5. Circle the prime numbers:
2
4
7
9
11
15
17
21
6. Is 13 a prime number? Explain your reasoning:
7. Why is 1 NOT considered a prime number?
It's too small
It only has one factor (itself)
It's an odd number
It can't be divided
8. Complete this sentence:
A prime number has exactly _____ factors: _____ and _____.
🧮 Part 3: Problem Solving
9. Sarah arranges 24 counters into equal rows. List 3 different ways she could arrange them:
10. Which statement is true about the number 2?
It's the smallest prime number
It's the only even prime number
Both statements above are true
Neither statement is true
11. Challenge: Find a number between 20 and 30 that is prime. Show your working to prove it's prime:
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