O-LevelMathematicsNumber4024/11 · May/June 2021 · Q42 Marks
A record is kept of the water level in a harbour. One morning, the level is 5m. That afternoon, the level is -2m. Find the difference between the level in the morning and the level in the afternoon.
- (a)A record is kept of the water level in a harbour. One morning, the level is 5m. That afternoon, the level is -2m. Find the difference between the level in the morning and the level in the afternoon.[1]
- (b)One day, the temperature at midday is 9°C. At midnight the temperature has dropped by 15.3°C. Find the temperature at midnight.[1]
Mark scheme
Marking points from the official mark scheme (May/June 2021). The mark or mark type is shown in brackets.
- [1] (a) 7
- [1] (b) -6.3
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