Keystones — Capstone
Five GCSE retrieval questions · 23 June 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 + 5.6x
Answer: (x + 2.8)² - 7.84 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 22cm, b = 25cm, angle = 76°
Answer: 266.8cm² -
4. Ratio Combining two ratios
a:b is 4:3 and b:c is 1:2. Find a:b:c.
Answer: 8:6:12 -
5. Statistics Averages and range
Find the mean, median and range of: 17, 41, 18, 62, 24, 41, 100, 68
Answer: Mean = 46.4, Median = 41, Range = 83