Keystones — Capstone
Five GCSE retrieval questions · 19 September 2022 · 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 + 2.8x
Answer: (x + 1.4)² - 1.96 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 29cm, b = 19cm, angle = 73°
Answer: 263.5cm² -
4. Ratio Combining two ratios
a:b is 3:4 and b:c is 1:2. Find a:b:c.
Answer: 9:12:24 -
5. Statistics Averages and range
Find the mean, median and range of: 34, 82, 56, 43, 87, 46, 83
Answer: Mean = 61.6, Median = 56, Range = 53