Keystones — Capstone
Five GCSE retrieval questions · 3 April 2020 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √108
Answer: 6√3 -
2. Algebra Completing the square
Complete the square: x² + 5x
Answer: (x + 2.5)² - 6.25 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 26cm, b = 18cm, angle = 68°
Answer: 217cm² -
4. Ratio Combining two ratios
a:b is 3:2 and b:c is 4:3. Find a:b:c.
Answer: 6:4:3 -
5. Statistics Averages and range
Find the mean, median and range of: 75, 44, 93, 65, 78, 88, 84
Answer: Mean = 75.3, Median = 78, Range = 49