Keystones — Capstone
Five GCSE retrieval questions · 8 April 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 + 4x
Answer: (x + 2)² - 4 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 16cm, b = 13cm, angle = 45°
Answer: 73.5cm² -
4. Ratio Combining two ratios
a:b is 2:3 and b:c is 2:5. Find a:b:c.
Answer: 4:6:15 -
5. Statistics Averages and range
Find the mean, median and range of: 78, 83, 60, 36, 68, 31, 94
Answer: Mean = 64.3, Median = 68, Range = 63