Keystones — Capstone
Five GCSE retrieval questions · 9 October 2020 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √363
Answer: 11√3 -
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 = 16cm, b = 29cm, angle = 59°
Answer: 198.9cm² -
4. Ratio Combining two ratios
a:b is 2:1 and b:c is 3:5. Find a:b:c.
Answer: 12:6:10 -
5. Statistics Averages and range
Find the mean, median and range of: 64, 94, 13, 67, 72, 65, 11, 54
Answer: Mean = 55, Median = 65, Range = 83