Keystones — Capstone
Five GCSE retrieval questions · 28 July 2019 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √125
Answer: 5√5 -
2. Algebra Completing the square
Complete the square: x² + 6x
Answer: (x + 3)² - 9 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 14cm, b = 26cm, angle = 54°
Answer: 147.2cm² -
4. Ratio Combining two ratios
a:b is 4:3 and b:c is 4:5. Find a:b:c.
Answer: 16:12:15 -
5. Statistics Averages and range
Find the mean, median and range of: 54, 100, 29, 55, 50, 34, 48
Answer: Mean = 52.9, Median = 50, Range = 71