Keystones — Capstone
Five GCSE retrieval questions · 2 June 2016 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √539
Answer: 7√11 -
2. Algebra Completing the square
Complete the square: x² - 3x + 9
Answer: (x - 3⁄2)² + 27⁄4 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 13cm, b = 26cm, angle = 68°. Give your answer to 2 decimal places
Answer: 156.69cm² -
4. Ratio Combining two ratios
a:b is 6:7 and b:c is 4:9. Find a:b:c in its simplest form.
Answer: 24:28:63 -
5. Statistics Averages and range
Find the mean, median and range of: 70, 56, 17, 62, 28, 73, 58
Answer: Mean = 52, Median = 58, Range = 56