Keystones — Capstone
Five GCSE retrieval questions · 9 June 2021 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √162
Answer: 9√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 = 23cm, b = 30cm, angle = 45°
Answer: 244cm² -
4. Ratio Combining two ratios
a:b is 3:2 and b:c is 1:3. Find a:b:c.
Answer: 3:2:6 -
5. Statistics Averages and range
Find the mean, median and range of: 13, 89, 97, 93, 28, 88, 14, 13, 14
Answer: Mean = 49.9, Median = 28, Range = 84