Daily Practice
Higher
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31st July 1990
- 1Writing a Ratio as a Fraction or Linear Function2 marks
x : y = 2 : 3. Write y in terms of x.
- 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
11 students study Spanish and 7 of those also study Art. One Spanish student is picked at random. Work out the probability they study Art.
- 4Capture Recapture3 marks
45 newts are marked and released. Later 36 are caught, of which 4 are marked. Estimate the population.
- 5Standard Form3 marks
Work out (36 x 10^10) / (4 x 10^3). 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 July 1990, including the monthly compilation PDF.