Keystones — Capstone
Five GCSE retrieval questions · 6 August 2022 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √147
Answer: 7√3 -
2. Algebra Completing the square
Complete the square: x² + 5.8x
Answer: (x + 2.9)² - 8.41 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 22cm, b = 18cm, angle = 74°
Answer: 190.3cm² -
4. Ratio Combining two ratios
a:b is 3:2 and b:c is 1:2. Find a:b:c.
Answer: 9:6:12 -
5. Statistics Averages and range
Find the mean, median and range of: 86, 91, 23, 59, 73, 43, 83
Answer: Mean = 65.4, Median = 73, Range = 68