Higher
4th August 1978
- 1Enlarging with Negative Scale Factors3 marks
The point (6, -2) is enlarged by scale factor -3 about the centre (2, 1). Write down the coordinates of the image.
- 2Venn Diagrams3 marks
In a Venn diagram, 7 are in A only, 18 in B only, 4 in both and 3 in neither. Work out the probability a random one is in both.
- 3Capture Recapture2 marks
A capture-recapture estimate is made of the moth population of a meadow. State one assumption the method relies on.
- 4Reverse Percentages3 marks
A bill is £264 including VAT at 20%. Work out the amount before VAT.
- 5Parallel and Perpendicular Lines3 marks
A line has equation y = 4x + 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 August 1978, including the monthly compilation PDF.