Daily Practice
Higher
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24th December 1985
- 1Writing a Ratio as a Fraction or Linear Function2 marks
x : y = 5 : 6. Write y in terms of x.
- 2Perpendicular Lines and the equation of a tangent2 marks
A line has gradient 5. Work out the gradient of a line perpendicular to it.
- 3Conditional Probability3 marks
23 students study Spanish and 4 of those also study Art. One Spanish student is picked at random. Work out the probability they study Art.
- 4Capture Recapture3 marks
15 voles are marked and released. Later 28 are caught, of which 4 are marked. Estimate the population.
- 5Fractional and Negative Indices2 marks
Write 3^-3 as a fraction.
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Any date always gives the same five questions, so a sheet can be set again or shared. All of December 1985, including the monthly compilation PDF.