Daily Practice
Higher
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5th December 1986
- 1Bounds2 marks
A mass is 80 kg, correct to the nearest 10. Write down the lower bound.
- 2Factorising Harder Quadratics3 marks
Factorise 10x^2 + x - 3.
- 3Direct and Inverse Proportion3 marks
y is directly proportional to x. When x = 9, y = 63. Work out y when x = 10.
- 4Spheres and Cones3 marks
A sphere has radius 15 cm. Work out its volume, leaving your answer in terms of pi.
- 5Probability Trees3 marks
3 of 6 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 December 1986, including the monthly compilation PDF.