Daily Practice
Higher
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18th February 1991
- 1Recurring Decimals to Fractions3 marks
Write the recurring decimal 0.6969... as a fraction in its simplest form.
- 2Factorising Harder Quadratics3 marks
Factorise 4x^2 + 19x + 12.
- 3Repeated Percentage Change3 marks
A price rises by 15% and then falls by 15%. Work out the overall percentage change, to 2 decimal places.
- 4Spheres and Cones3 marks
A sphere has radius 9 cm. Work out its volume, leaving your answer in terms of pi.
- 5Probability Trees3 marks
4 of 7 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 February 1991, including the monthly compilation PDF.