Keystones — Capstone
Five GCSE retrieval questions · 28 April 2022 · 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 + 4.8x
Answer: (x + 2.4)² - 5.76 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 26cm, b = 30cm, angle = 56°
Answer: 323.3cm² -
4. Ratio Combining two ratios
a:b is 4:3 and b:c is 3:4. Find a:b:c.
Answer: 4:3:4 -
5. Statistics Averages and range
Find the mean, median and range of: 36, 98, 17, 65, 31, 62, 65
Answer: Mean = 53.4, Median = 62, Range = 81