Keystones — Capstone
Five GCSE retrieval questions · 13 March 2020 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √192
Answer: 8√3 -
2. Algebra Completing the square
Complete the square: x² + 6x
Answer: (x + 3)² - 9 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 30cm, b = 13cm, angle = 69°
Answer: 182cm² -
4. Ratio Combining two ratios
a:b is 3:4 and b:c is 3:4. Find a:b:c.
Answer: 9:12:16 -
5. Statistics Averages and range
Find the mean, median and range of: 19, 78, 13, 85, 28, 58, 91
Answer: Mean = 53.1, Median = 58, Range = 78