Keystones — Capstone
Five GCSE retrieval questions · 17 August 2022 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √288
Answer: 12√2 -
2. Algebra Completing the square
Complete the square: x² + 6x
Answer: (x + 3)² - 9 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 26cm, b = 18cm, angle = 58°
Answer: 198.4cm² -
4. Ratio Combining two ratios
a:b is 2:1 and b:c is 2:3. Find a:b:c.
Answer: 8:4:6 -
5. Statistics Averages and range
Find the mean, median and range of: 85, 92, 90, 83, 89, 62, 61, 49
Answer: Mean = 76.4, Median = 85, Range = 43