0580/11 May/Jun 2024, Question 18: Factors and Multiples
Cambridge IGCSE Mathematics 0580 · Paper 11 (Core) · Calculator · 2 marks
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The question, in short
Find the largest odd number that divides both 140 and 210 exactly.
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Solution · 2 marks
- 1140 = 2 × 2 × 5 × 7
- 2210 = 2 × 3 × 5 × 7
- 3Common odd prime factors: 5 and 7
- 4Greatest odd common factor = 5 × 7 = 35
Answer35
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