0580/12 Oct/Nov 2023, Question 12: Prime Numbers
Cambridge IGCSE Mathematics 0580 · Paper 12 (Core) · Calculator · 2 marks
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The question, in short
Explain why 111 is not prime, then identify a prime number in the range 110 to 120.
Summarised in our own words. Use the official paper for the exact wording and any diagrams.
Part (a) · 1 mark
Give a reason that 111 is not a prime number.
- 1111 = 3 × 37, so it is a multiple of 3 (and of 37)
AnswerMultiple of 3 or multiple of 37
Part (b) · 1 mark
State a prime number that lies between 110 and 120.
- 1113 has no factors other than 1 and 113
- 2113
Answer113
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Also searched as: 0580/12/O/N/23 · 0580_w23_qp_12 · 0580 w23 12 · question 12.
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