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0580/12 Feb/Mar 2024, Question 10: Directed Numbers

Cambridge IGCSE Mathematics 0580 · Paper 12 (Core) · Calculator · 2 marks

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The question, in short

Using the given list of numbers, work out the greatest product of two numbers and the least product of three numbers.

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

Part (a) · 1 mark

Find the largest possible product obtained by multiplying two numbers from the list.

  1. 1Largest positive products: (−9) × (−7) = 63 and 8 × 6 = 48
  2. 2Highest = 63

Answer63

Part (b) · 1 mark

Find the smallest possible product obtained by multiplying three numbers from the list.

  1. 1Need a large negative product: one negative × two largest positives
  2. 2(−9) × 8 × 6 = −432
  3. 3Lowest = −432

Answer−432

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