Higher
16th October 1987
- 1Enlarging with Negative Scale Factors3 marks
The point (-3, 2) is enlarged by scale factor -1 about the centre (1, 3). Write down the coordinates of the image.
- 2Venn Diagrams3 marks
In a Venn diagram, 14 are in A only, 15 in B only, 5 in both and 4 in neither. Work out the probability a random one is in both.
- 3Capture Recapture2 marks
A capture-recapture estimate is made of the snail population of a hedgerow. State one assumption the method relies on.
- 4Recurring Decimals to Fractions3 marks
Write the recurring decimal 0.6060... as a fraction in its simplest form.
- 5Parallel and Perpendicular Lines3 marks
A line has equation y = 5x + 2. Work out the gradient of any line perpendicular to it.
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Any date always gives the same five questions, so a sheet can be set again or shared. All of October 1987, including the monthly compilation PDF.