Keystones — Capstone
Five GCSE retrieval questions · 22 May 2022 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √125
Answer: 5√5 -
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 = 23cm, b = 27cm, angle = 69°
Answer: 289.9cm² -
4. Ratio Combining two ratios
a:b is 3:2 and b:c is 1:2. Find a:b:c.
Answer: 3:2:4 -
5. Statistics Averages and range
Find the mean, median and range of: 100, 45, 59, 61, 39, 27, 92, 79
Answer: Mean = 62.8, Median = 61, Range = 73