0580/12 May/Jun 2023, Question 7: Prime Numbers
Cambridge IGCSE Mathematics 0580 · Paper 12 (Core) · Calculator · 2 marks
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The question, in short
Identify the two prime numbers among 27, 47, 57, 61, 75, 93 and calculate their sum.
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Solution · 2 marks
- 127 = 3 × 9, 57 = 3 × 19, 75 = 3 × 25, 93 = 3 × 31
- 2Primes: 47 and 61
- 347 + 61 = 108
Answer108
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