Keystones — Capstone
Five GCSE retrieval questions · 29 November 2021 · 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 + 3.4x
Answer: (x + 1.7)² - 2.89 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 14cm, b = 16cm, angle = 44°
Answer: 77.8cm² -
4. Ratio Combining two ratios
a:b is 3:2 and b:c is 2:3. Find a:b:c.
Answer: 3:2:3 -
5. Statistics Averages and range
Find the mean, median and range of: 87, 35, 76, 89, 75, 67, 12, 70
Answer: Mean = 63.9, Median = 75, Range = 77