Keystones — Capstone
Five GCSE retrieval questions · 4 November 2024 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √242
Answer: 11√2 -
2. Algebra Completing the square
Complete the square: x² + 3.2x
Answer: (x + 1.6)² - 2.56 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 13cm, b = 12cm, angle = 53°
Answer: 62.3cm² -
4. Ratio Combining two ratios
a:b is 2:1 and b:c is 2:5. Find a:b:c.
Answer: 4:2:5 -
5. Statistics Averages and range
Find the mean, median and range of: 53, 71, 27, 66, 32, 11, 36, 16, 88
Answer: Mean = 44.4, Median = 36, Range = 77