Keystones — Capstone
Five GCSE retrieval questions · 27 July 2017 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √896
Answer: 8√14 -
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 = 26cm, b = 28cm, angle = 59°. Give your answer to 2 decimal places
Answer: 312.01cm² -
4. Ratio Combining two ratios
a:b is 1:4 and b:c is 3:8. Find a:b:c in its simplest form.
Answer: 3:12:32 -
5. Statistics Averages and range
Find the mean, median and range of: 14, 37, 18, 22, 41, 81, 92, 63
Answer: Mean = 46, Median = 39, Range = 78