0580/11 Oct/Nov 2025, Question 17: Prime Numbers
Cambridge IGCSE Mathematics 0580 · Paper 11 (Core) · Non-calculator · 2 marks
اقرأ هذا الحل مشروحاً بالعربي ←
The question, in short
Identify a prime number in the range 20 to 30, then simplify the square of the square root of 9.
Summarised in our own words. Use the official paper for the exact wording and any diagrams.
Part (a) · 1 mark
State a prime number that lies between 20 and 30.
- 1Primes between 20 and 30: 23, 29
Answer23 or 29
Part (b) · 1 mark
Simplify the expression (√9)².
- 1(√9)² = 3² = 9
Answer9
Stuck on a step? Read the free lesson: Prime Numbers
Practise more prime numbers questions
Real 0580 past-paper questions, marked on your working like the exam, with a worked solution for every part.
Practise free on LemmaraMore past-paper questions on prime numbers
Also searched as: 0580/11/O/N/25 · 0580_w25_qp_11 · 0580 w25 11 · question 17.
Lemmara is an independent study tool, not affiliated with or endorsed by Cambridge International Education. The worked solutions are Lemmara’s own.