Keystones — Capstone
Five GCSE retrieval questions · 29 December 2022 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √192
Answer: 8√3 -
2. Algebra Completing the square
Complete the square: x² + 5.8x
Answer: (x + 2.9)² - 8.41 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 14cm, b = 22cm, angle = 70°
Answer: 144.7cm² -
4. Ratio Combining two ratios
a:b is 3:4 and b:c is 1:3. Find a:b:c.
Answer: 3:4:12 -
5. Statistics Averages and range
Find the mean, median and range of: 60, 11, 50, 83, 63, 95, 24, 52
Answer: Mean = 54.8, Median = 60, Range = 84