Keystones — Capstone
Five GCSE retrieval questions · 4 April 2019 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √147
Answer: 7√3 -
2. Algebra Completing the square
Complete the square: x² + 5.2x
Answer: (x + 2.6)² - 6.76 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 16cm, b = 26cm, angle = 58°
Answer: 176.4cm² -
4. Ratio Combining two ratios
a:b is 3:4 and b:c is 4:5. Find a:b:c.
Answer: 3:4:5 -
5. Statistics Averages and range
Find the mean, median and range of: 45, 30, 63, 21, 84, 96, 85
Answer: Mean = 60.6, Median = 63, Range = 75