O-LevelMathematicsNumber4024/12 · May/June 2017 · Q62 Marks
A thermometer measures temperature correct to the nearest degree. The outside temperature is measured as -8°C.
- (a)Write down the upper bound of the outside temperature.[1]
- (b)The inside temperature is measured as 10°C. Calculate the lower bound of the difference between the outside temperature and the inside temperature.[1]
Mark scheme
Marking points from the official mark scheme (May/June 2017). The mark or mark type is shown in brackets.
- [1] (a) -7.5
- [1] (b) 17
- FT 9.5 - their (a), where –9 < their (a) < -7
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