Keystones — Capstone
Five GCSE retrieval questions · 1 May 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 + 6x
Answer: (x + 3)² - 9 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 29cm, b = 24cm, angle = 62°
Answer: 307.3cm² -
4. Ratio Combining two ratios
a:b is 2:1 and b:c is 4:5. Find a:b:c.
Answer: 8:4:5 -
5. Statistics Averages and range
Find the mean, median and range of: 83, 10, 13, 55, 71, 37, 51, 69
Answer: Mean = 48.6, Median = 55, Range = 73