Keystones — Capstone
Five GCSE retrieval questions · 14 November 2024 · 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 + 4.6x
Answer: (x + 2.3)² - 5.29 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 15cm, b = 26cm, angle = 50°
Answer: 149.4cm² -
4. Ratio Combining two ratios
a:b is 2:1 and b:c is 2:5. Find a:b:c.
Answer: 4:2:5 -
5. Statistics Averages and range
Find the mean, median and range of: 89, 80, 63, 52, 76, 77, 48, 39, 19
Answer: Mean = 60.3, Median = 63, Range = 70