4MA1/1HR Jun 2025, Question 2: Upper and Lower Bounds
Pearson Edexcel International GCSE Mathematics A 4MA1 · Paper 1HR (Higher) · Calculator · 2 marks
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The question, in short
A ship's length is 142.8 m, rounded to 1 decimal place. State the lower and upper bounds of this length.
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Part (i) · 1 mark
Write down the lower bound of the ship's length.
- 1Half of 0.1 is 0.05
- 2142.8 − 0.05 = 142.75
Answer142.75
Part (ii) · 1 mark
Write down the upper bound of the ship's length.
- 1Half of 0.1 is 0.05
- 2142.8 + 0.05 = 142.85
Answer142.85
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