Higher
27th November 1981
- 1Direct and Inverse Proportion3 marks
y is directly proportional to x. When x = 4, y = 40. Work out y when x = 2.
- 2Perpendicular Lines and the equation of a tangent2 marks
A line has gradient -3. Work out the gradient of a line perpendicular to it.
- 3Conditional Probability3 marks
20 students study Spanish and 10 of those also study Art. One Spanish student is picked at random. Work out the probability they study Art.
- 4Capture Recapture2 marks
A capture-recapture estimate is made of the ladybird population of a garden. State one assumption the method relies on.
- 5Standard Form3 marks
Work out (9 x 10^7) / (3 x 10^2). Give your answer in standard form.
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Any date always gives the same five questions, so a sheet can be set again or shared. All of November 1981, including the monthly compilation PDF.