Keystones — Capstone
Five GCSE retrieval questions · 3 June 2017 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √32
Answer: 4√2 -
2. Algebra Completing the square
Complete the square: 3x² + 24x + 9
Answer: 3(x + 4)² - 39 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 20cm, b = 26cm, angle = 63°. Give your answer to 2 decimal places
Answer: 231.66cm² -
4. Ratio Combining two ratios
a:b is 5:4 and b:c is 6:1. Find a:b:c in its simplest form.
Answer: 15:12:2 -
5. Statistics Averages and range
Find the mean, median and range of: 64, 18, 55, 20, 18, 71, 10, 52
Answer: Mean = 38.5, Median = 36, Range = 61