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4MA1/1H Jun 2025, Question 2: Upper and lower bounds

Pearson Edexcel International GCSE Mathematics A 4MA1 · Paper 1H (Higher) · Calculator · 6 marks

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The question, in short

A length is 142.8 m, correct to 1 decimal place. Write down its lower and upper bounds.

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

Part (a) · 4 marks

  1. 1Cost: 80 × 4 × 6 = 1920
  2. 2Profit: 2160 − 1920 = 240
  3. 3240 ÷ 1920 = 0.125
  4. 40.125 × 100 = 12.5%

Answer12.5

Part (b) · 1 mark

  1. 1Nearest cm means ± 0.5 cm
  2. 29 − 0.5 = 8.5

Answer8.5

Part (c) · 1 mark

  1. 1Nearest 10 g means ± 5 g
  2. 2120 + 5 = 125

Answer125

Stuck on a step? Read the free lesson: Profit and Loss

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