Keystones — Capstone
Five GCSE retrieval questions · 12 November 2024 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √128
Answer: 8√2 -
2. Algebra Completing the square
Complete the square: x² + 2x
Answer: (x + 1)² - 1 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 27cm, b = 27cm, angle = 67°
Answer: 335.5cm² -
4. Ratio Combining two ratios
a:b is 3:2 and b:c is 1:2. Find a:b:c.
Answer: 9:6:12 -
5. Statistics Averages and range
Find the mean, median and range of: 19, 51, 82, 12, 17, 85, 61, 78
Answer: Mean = 50.6, Median = 61, Range = 73