O-LevelMathematicsNumber4024/22 · Oct/Nov 2025 · Q154 Marks
The mass of a bag of potatoes is 2.5kg, correct to the nearest 0.1 kg.
- (a)Write down the upper bound and the lower bound for the mass of a bag of potatoes.[2]
- (b)The mass of a box is 8.0kg, correct to the nearest 0.1 kg. Bags of potatoes are packed into the box. Calculate the upper bound for the total mass of a box containing 12 bags of potatoes.[2]
Mark scheme
Marking points from the official mark scheme (Oct/Nov 2025). The mark or mark type is shown in brackets.
- [2] [upper bound = ] 2.55, [lower bound = ] 2.45. B1 for one correct or for both values correct but reversed
- [2] 38.65 cao. B1 for 8.05 oe seen or for correct answer seen or M1 for 12 × their 2.55 + their 8.05
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