Daily Practice - Higher
Grades 6-7 - Higher-tier method and manipulation.
4th August 2011
- 1Repeated Percentage Change3 marks
A town's population is 21000 and grows by 4% each year. Work out the population after 4 years, to the nearest whole number.
- 2Spheres and Cones3 marks
A sphere has radius 9 cm. Work out its volume, leaving your answer in terms of pi.
- 3Probability Trees3 marks
3 of 10 bulbs in a box are faulty. Two are taken with replacement. Work out the probability at least one is faulty.
- 4Histograms2 marks
A histogram class is 20 units wide and contains 40 values. Work out the frequency density.
- 5Surds2 marks
Write sqrt(12) in the form a sqrt(b), where b is as small as possible.
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