Higher Plus
29th December 1971
- 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 rectangle is 11 cm by 19 cm, each correct to the nearest cm. Work out the upper bound of its area.
- 3Algebraic Fractions3 marks
Write 5/(x - 1) + 7/(x - 2) as a single fraction.
- 4Velocity Time Graphs3 marks
A tram runs at 19 m/s for 20 s, then slows steadily to rest over 4 s. Work out its average speed for the whole journey, to 2 decimal places.
- 5Perpendicular Lines and the equation of a tangent3 marks
The point (9, 40) lies on the circle x^2 + y^2 = 1681. Work out the gradient of the tangent to the circle at that point.
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Any date always gives the same five questions, so a sheet can be set again or shared. All of December 1971, including the monthly compilation PDF.