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0580/31 May/Jun 2025, Question 14: Direct Proportion in Real Life

Cambridge IGCSE Mathematics 0580 · Paper 31 (Core) · Calculator · 3 marks

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The question, in short

Tom uses 225 g flour for 10 cakes; find how many 500 g bags are needed for 70 cakes.

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

Solution · 3 marks

  1. 1225 × 70/10 = 1575 g
  2. 21575 ÷ 500 = 3.15
  3. 33 bags is not enough, so round up
  4. 44 bags

Answer4

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