Keystones — Capstone
Five GCSE retrieval questions · 27 March 2019 · 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 + 3x
Answer: (x + 1.5)² - 2.25 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 27cm, b = 16cm, angle = 54°
Answer: 174.7cm² -
4. Ratio Combining two ratios
a:b is 2:1 and b:c is 4:5. Find a:b:c.
Answer: 8:4:5 -
5. Statistics Averages and range
Find the mean, median and range of: 66, 96, 100, 95, 73, 95, 87, 14
Answer: Mean = 78.3, Median = 95, Range = 86