Higher Plus
27th July 1985
- 1Velocity Time Graphs2 marks
A train slows steadily from 29 m/s to rest in 8 seconds. Work out its deceleration.
- 2The Sine Rule3 marks
In triangle ABC, angle A is 71°, side a is 12 cm and side b is 6 cm. Work out the acute angle B, to 1 decimal place.
- 3Conditional Probability3 marks
A bag holds 4 red and 6 blue counters. Two are taken without replacement. Given the first was red, what is the probability the second is blue?
- 4Histograms3 marks
On a histogram the bar for 20 < x <= 25 has a frequency density of 3.5. How many values are in that class?
- 5Bounds3 marks
A car covers 390 m (to the nearest 10 m) in 2 s (to the nearest second). Work out the lower bound of its speed, to 2 decimal places.
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Any date always gives the same five questions, so a sheet can be set again or shared. All of July 1985, including the monthly compilation PDF.