BitWithBite
Mathematics Worksheet
🤝 Greatest Common Factor
SCORE___ / 20
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After this worksheet you can
Find the GCF of two numbers.Use the GCF to simplify fractions.Recognise coprime numbers.List common factors of two numbers.📚 Quick Recap
The greatest common factor (GCF) is the largest number that divides two or more numbers exactly — a key tool for simplifying fractions.
🧠 Section A · Concept Check ● BEGINNER 4 × 1 = 4
1GCF of 16 and 20 = ?
2GCF of 18 and 27 = ?
3Simplify 12/18 using the GCF:
4GCF of 30 and 45 = ?
🧮 Section B · Problem Solving ● INTERMEDIATE 2 + 3×3 = 11
5The GCF is the number that divides both.
6GCF of 16 and 20 = .
7Find the GCF of 16 and 20.
8Find the GCF of 18 and 27.
9Find the GCF of 30 and 45.
🚀 Section C · Challenge ● CHALLENGE 5
10Simplify 12/18 using the GCF.
💭 Reflection — the most useful thing I learned:
A ___/4 B ___/11 C ___/5 Total ___/20
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✂ answer key — fold or cut before handing out
1-B 2-C 3-A 4-C | 5 largest 6 4 7 = 4 8 = 9 9 = 15 | 10 = 2/3