Keystones — Capstone
Five GCSE retrieval questions · 19 January 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 + 2x
Answer: (x + 1)² - 1 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 28cm, b = 22cm, angle = 80°
Answer: 303.3cm² -
4. Ratio Combining two ratios
a:b is 3:4 and b:c is 2:3. Find a:b:c.
Answer: 3:4:6 -
5. Statistics Averages and range
Find the mean, median and range of: 20, 31, 44, 98, 52, 17, 68, 37
Answer: Mean = 45.9, Median = 44, Range = 81