Daily Practice - Higher Plus
2nd November 1991
- 1Histograms2 marks
On a histogram, a 5-wide bar and a 15-wide bar have the same frequency density of 3. How many more values are in the wider class?
- 2Bounds3 marks
A car covers 570 m (to the nearest 10 m) in 6 s (to the nearest second). Work out the lower bound of its speed, to 2 decimal places.
- 3Factorising Harder Quadratics3 marks
Solve 16x^2 + 16x + 3 = 0.
- 4Velocity Time Graphs3 marks
A tram runs at 11 m/s for 30 s, then slows steadily to rest over 4 s. Work out its average speed for the whole journey, to 2 decimal places.
- 53d Pythagoras and Trigonometry3 marks
A cuboid measures 13 cm by 10 cm by 15 cm. Work out the length of the longest diagonal inside it, to 1 decimal place.
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