Keystones — Capstone
Five GCSE retrieval questions · 9 March 2021 · 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 + 3x
Answer: (x + 1.5)² - 2.25 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 24cm, b = 29cm, angle = 46°
Answer: 250.3cm² -
4. Ratio Combining two ratios
a:b is 2:1 and b:c is 1:3. Find a:b:c.
Answer: 4:2:6 -
5. Statistics Averages and range
Find the mean, median and range of: 94, 61, 52, 82, 59, 12, 92
Answer: Mean = 64.6, Median = 61, Range = 82