Keystones — Capstone
Five GCSE retrieval questions · 24 April 2019 · 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 + 4x
Answer: (x + 2)² - 4 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 26cm, b = 16cm, angle = 40°
Answer: 133.7cm² -
4. Ratio Combining two ratios
a:b is 1:2 and b:c is 3:4. Find a:b:c.
Answer: 6:12:16 -
5. Statistics Averages and range
Find the mean, median and range of: 28, 94, 11, 74, 71, 66, 82
Answer: Mean = 60.9, Median = 71, Range = 83