Higher
26th October 1985
- 1Enlarging with Negative Scale Factors3 marks
The point (3, 4) is enlarged by scale factor -1 about the centre (1, 0). Write down the coordinates of the image.
- 2Venn Diagrams3 marks
In a Venn diagram, 3 are in A only, 17 in B only, 10 in both and 2 in neither. Work out the probability a random one is in both.
- 3Box Plots2 marks
A box plot has minimum 11, lower quartile 18, median 27, upper quartile 34 and maximum 42. Work out the interquartile range.
- 4Reverse Percentages3 marks
A bill is £168 including VAT at 20%. Work out the amount before VAT.
- 5Parallel and Perpendicular Lines3 marks
A line has equation y = -3x + 8. 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 1985, including the monthly compilation PDF.