Higher Plus
16th January 1973
- 1Histograms2 marks
On a histogram, a 5-wide bar and a 20-wide bar have the same frequency density of 1.5. How many more values are in the wider class?
- 2Surds3 marks
Expand and simplify (6 + sqrt(2))(6 - sqrt(2)).
- 3Completing the Square3 marks
Work out the coordinates of the turning point of y = x^2 + 8x - 3.
- 4Velocity Time Graphs3 marks
A tram runs at 17 m/s for 30 s, then slows steadily to rest over 10 s. Work out its average speed for the whole journey, to 2 decimal places.
- 53d Pythagoras and Trigonometry3 marks
A cuboid measures 4 cm by 5 cm by 14 cm tall. Work out the angle between its longest internal diagonal and the base, to 1 decimal place.
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Any date always gives the same five questions, so a sheet can be set again or shared. All of January 1973, including the monthly compilation PDF.