Keystones — Capstone
Five GCSE retrieval questions · 17 November 2016 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √294
Answer: 7√6 -
2. Algebra Completing the square
Complete the square: x² - 11x - 2
Answer: (x - 11⁄2)² - 129⁄4 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 22cm, b = 18cm, angle = 59°. Give your answer to 2 decimal places
Answer: 169.72cm² -
4. Ratio Combining two ratios
a:b is 9:2 and b:c is 3:1. Find a:b:c in its simplest form.
Answer: 27:6:2 -
5. Statistics Averages and range
Find the mean, median and range of: 62, 19, 62, 32, 75, 49, 86, 85, 79
Answer: Mean = 61, Median = 62, Range = 67