Daily Practice - Higher
Grades 6-7 - Higher-tier method and manipulation.
9th December 2013
- 1Repeated Percentage Change3 marks
A price rises by 25% and then falls by 15%. Work out the overall percentage change, to 2 decimal places.
- 2Sector Areas and Arc Lengths3 marks
A sector of a circle has radius 5 cm and angle 120°. Work out its area, to 1 decimal place.
- 3Conditional Probability3 marks
9 students study Spanish and 4 of those also study Art. One Spanish student is picked at random. Work out the probability they study Art.
- 4Cumulative Frequency2 marks
A cumulative frequency graph is drawn for 228 values. What cumulative frequency do you read across from to estimate the lower quartile?
- 5Surds2 marks
Write sqrt(72) in the form a sqrt(b), where b is as small as possible.
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