Keystones — Capstone
Five GCSE retrieval questions · 12 July 2016 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √684
Answer: 6√19 -
2. Algebra Completing the square
Complete the square: x² - 3x + 11
Answer: (x - 3⁄2)² + 35⁄4 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 28cm, b = 18cm, angle = 76°. Give your answer to 2 decimal places
Answer: 244.51cm² -
4. Ratio Combining two ratios
a:b is 9:2 and b:c is 7:9. Find a:b:c in its simplest form.
Answer: 63:14:18 -
5. Statistics Averages and range
Find the mean, median and range of: 62, 98, 12, 88, 49, 33, 95, 91
Answer: Mean = 66, Median = 75, Range = 86