Keystones — Capstone
Five GCSE retrieval questions · 3 July 2019 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √243
Answer: 9√3 -
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 = 26cm, angle = 68°
Answer: 337.5cm² -
4. Ratio Combining two ratios
a:b is 4:3 and b:c is 1:2. Find a:b:c.
Answer: 8:6:12 -
5. Statistics Averages and range
Find the mean, median and range of: 100, 19, 49, 32, 89, 96, 11, 42
Answer: Mean = 54.8, Median = 49, Range = 89