Keystones — Capstone
Five GCSE retrieval questions · 30 May 2022 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √192
Answer: 8√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 = 28cm, b = 15cm, angle = 51°
Answer: 163.2cm² -
4. Ratio Combining two ratios
a:b is 2:3 and b:c is 1:2. Find a:b:c.
Answer: 2:3:6 -
5. Statistics Averages and range
Find the mean, median and range of: 30, 29, 99, 15, 16, 53, 52
Answer: Mean = 42, Median = 30, Range = 84