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4MA1/2F Jun 2018, Question 5: Factors and Multiples

Pearson Edexcel International GCSE Mathematics A 4MA1 · Paper 2F (Foundation) · Calculator · 3 marks

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The question, in short

Find a multiple of 8 in the range 20 to 50, identify the even prime, and judge whether 57 is prime with a reason.

Summarised in our own words. Use the official paper for the exact wording and any diagrams.

Part (a) · 1 mark

State a multiple of 8 lying between 20 and 50.

  1. 18 × 3 = 24

Answer24

Part (b) · 1 mark

State the only prime number that is even.

  1. 1The only even prime number is 2

Answer2

Part (c) · 1 mark

Decide if Shreya is right that 57 is prime and justify your decision.

  1. 157 ÷ 3 = 19
  2. 2So 57 is not prime
  3. 3It is divisible by 3

AnswerNo It is divisible by 3

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