Keystones — Capstone
Five GCSE retrieval questions · 20 January 2023 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √363
Answer: 11√3 -
2. Algebra Completing the square
Complete the square: x² + 3.2x
Answer: (x + 1.6)² - 2.56 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 22cm, b = 16cm, angle = 67°
Answer: 162cm² -
4. Ratio Combining two ratios
a:b is 1:2 and b:c is 1:3. Find a:b:c.
Answer: 2:4:12 -
5. Statistics Averages and range
Find the mean, median and range of: 92, 96, 77, 48, 31, 17, 54, 17, 39
Answer: Mean = 52.3, Median = 48, Range = 79