Keystones — Capstone
Five GCSE retrieval questions · 23 September 2022 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √288
Answer: 12√2 -
2. Algebra Completing the square
Complete the square: x² + 3x
Answer: (x + 1.5)² - 2.25 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 22cm, b = 23cm, angle = 46°
Answer: 182cm² -
4. Ratio Combining two ratios
a:b is 2:3 and b:c is 4:5. Find a:b:c.
Answer: 8:12:15 -
5. Statistics Averages and range
Find the mean, median and range of: 76, 58, 82, 75, 64, 45, 13
Answer: Mean = 59, Median = 64, Range = 69