Keystones — Capstone
Five GCSE retrieval questions · 30 November 2022 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √363
Answer: 11√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 = 12cm, b = 17cm, angle = 56°
Answer: 84.6cm² -
4. Ratio Combining two ratios
a:b is 3:2 and b:c is 3:5. Find a:b:c.
Answer: 9:6:10 -
5. Statistics Averages and range
Find the mean, median and range of: 45, 21, 62, 89, 17, 48, 72
Answer: Mean = 50.6, Median = 48, Range = 72