Higher
24th October 1961
- 1Parallel and Perpendicular Lines3 marks
A line has equation y = -4x + 7. Work out the gradient of any line perpendicular to it.
- 2Writing a Ratio as a Fraction or Linear Function2 marks
x : y = 3 : 4. Write y in terms of x.
- 3Enlarging with Negative Scale Factors3 marks
The point (4, -4) is enlarged by scale factor -3 about the centre (3, -4). Write down the coordinates of the image.
- 4Venn Diagrams3 marks
In a Venn diagram, 7 are in A only, 7 in B only, 3 in both and 3 in neither. Work out the probability a random one is in both.
- 5Capture Recapture3 marks
15 beetles are marked and released. Later 30 are caught, of which 5 are marked. Estimate the population.
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Any date always gives the same five questions, so a sheet can be set again or shared. All of October 1961, including the monthly compilation PDF.