Daily Practice
Higher
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19th September 1987
- 1Reverse Percentages3 marks
A bill is £336 including VAT at 20%. Work out the amount before VAT.
- 2Factorising Harder Quadratics3 marks
Factorise 6x^2 - 13x - 5.
- 3Direct and Inverse Proportion Depth3 marks
y is directly proportional to x^2. When x = 3, y = 36. Work out y when x = 4.
- 4Spheres and Cones3 marks
A sphere has radius 9 cm. Work out its volume, leaving your answer in terms of pi.
- 5Probability Trees3 marks
3 of 5 bulbs in a box are faulty. Two are taken with replacement. Work out the probability at least one is faulty.
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Any date always gives the same five questions, so a sheet can be set again or shared. All of September 1987, including the monthly compilation PDF.