Greatest common factor of two or three numbers
6th grade (Year 7 in England) · 16 questions · Common Core: 6.NS.B.4 · England: KS3 Number, GCSE Foundation Number
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Date
Score/ 16
Question 1
Find the GCF (highest common factor) of 24 and 18.
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Question 2
Find the GCF of 10, 15, 25.
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Question 3
132 = 2² × 3 × 11 and 198 = 2 × 3² × 11. Use these to find the GCF of 132 and 198.
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Question 4
Find the GCF (highest common factor) of 63 and 45.
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Question 5
Find the GCF of 10, 35, 25.
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Question 6
72 = 2³ × 3² and 120 = 2³ × 3 × 5. Use these to find the GCF of 72 and 120.
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Question 7
Find the GCF (highest common factor) of 54 and 45.
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Question 8
Find the GCF of 35, 10, 15.
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Question 9
72 = 2³ × 3² and 120 = 2³ × 3 × 5. Use these to find the GCF of 72 and 120.
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Question 10
Find the GCF (highest common factor) of 15 and 35.
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Question 11
Find the GCF of 6, 14, 4.
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Question 12
98 = 2 × 7² and 140 = 2² × 5 × 7. Use these to find the GCF of 98 and 140.
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Question 13
Find the GCF (highest common factor) of 48 and 56.
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Question 14
Find the GCF of 24, 16, 56.
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Question 15
126 = 2 × 3² × 7 and 210 = 2 × 3 × 5 × 7. Use these to find the GCF of 126 and 210.
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Question 16
Find the GCF (highest common factor) of 24 and 30.
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