Question 7 — IGCSE 0580 Oct/Nov 2025 Paper 23
Cambridge IGCSE Mathematics 0580, Extended tier, non-calculator. Topic: Numbers · The four rules. Worth 3 marks.
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Question text
7 (a) The sum of all the prime numbers less than 10 is equal to 17.
Find the sum of all the prime numbers less than 16.
................................................. [2]
(b) x is an integer.
The sum of the prime numbers greater than 6 and less than x is equal to 18.
Find a possible value for x.
x = ................................................ [1]
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NIGRAM
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