Keystones — Capstone
Five GCSE retrieval questions · 29 June 2020 · 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 + 5.4x
Answer: (x + 2.7)² - 7.29 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 26cm, b = 22cm, angle = 68°
Answer: 265.2cm² -
4. Ratio Combining two ratios
a:b is 3:4 and b:c is 2:5. Find a:b:c.
Answer: 3:4:10 -
5. Statistics Averages and range
Find the mean, median and range of: 98, 13, 14, 61, 80, 75, 88, 92
Answer: Mean = 65.1, Median = 80, Range = 85