Keystones — Capstone
Five GCSE retrieval questions · 19 August 2018 · 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 + 3x
Answer: (x + 1.5)² - 2.25 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 28cm, b = 18cm, angle = 64°
Answer: 226.5cm² -
4. Ratio Combining two ratios
a:b is 3:2 and b:c is 4:3. Find a:b:c.
Answer: 6:4:3 -
5. Statistics Averages and range
Find the mean, median and range of: 19, 72, 17, 34, 74, 13, 33
Answer: Mean = 37.4, Median = 33, Range = 61