Higher
10th December 1982
- 1Direct and Inverse Proportion3 marks
y is directly proportional to x. When x = 9, y = 90. Work out y when x = 5.
- 2Spheres and Cones3 marks
A sphere has radius 15 cm. Work out its volume, leaving your answer in terms of pi.
- 3Probability Trees3 marks
3 of 7 bulbs in a box are faulty. Two are taken with replacement. Work out the probability at least one is faulty.
- 4Capture Recapture2 marks
A capture-recapture estimate is made of the ladybird population of a garden. State one assumption the method relies on.
- 5Recurring Decimals to Fractions3 marks
Write the recurring decimal 0.7373... as a fraction in its simplest form.
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Any date always gives the same five questions, so a sheet can be set again or shared. All of December 1982, including the monthly compilation PDF.