Keystones — Capstone
Five GCSE retrieval questions · 10 December 2022 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √162
Answer: 9√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 = 26cm, b = 15cm, angle = 80°
Answer: 192cm² -
4. Ratio Combining two ratios
a:b is 4:3 and b:c is 4:5. Find a:b:c.
Answer: 16:12:15 -
5. Statistics Averages and range
Find the mean, median and range of: 34, 53, 26, 66, 33, 63, 34, 31
Answer: Mean = 42.5, Median = 34, Range = 40