Keystones — Capstone
Five GCSE retrieval questions · 23 November 2022 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √242
Answer: 11√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 = 24cm, b = 14cm, angle = 52°
Answer: 132.4cm² -
4. Ratio Combining two ratios
a:b is 3:2 and b:c is 2:3. Find a:b:c.
Answer: 6:4:6 -
5. Statistics Averages and range
Find the mean, median and range of: 84, 93, 66, 96, 26, 34, 55, 56
Answer: Mean = 63.8, Median = 66, Range = 70