Keystones — Capstone
Five GCSE retrieval questions · 6 September 2022 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √200
Answer: 10√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 = 29cm, b = 30cm, angle = 62°
Answer: 384.cm² -
4. Ratio Combining two ratios
a:b is 2:1 and b:c is 1:2. Find a:b:c.
Answer: 4:2:4 -
5. Statistics Averages and range
Find the mean, median and range of: 59, 18, 22, 56, 25, 20, 100, 45, 83
Answer: Mean = 47.6, Median = 45, Range = 82