Keystones — Capstone
Five GCSE retrieval questions · 27 January 2023 · 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 + 3.8x
Answer: (x + 1.9)² - 3.61 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 16cm, b = 14cm, angle = 44°
Answer: 77.8cm² -
4. Ratio Combining two ratios
a:b is 3:2 and b:c is 3:5. Find a:b:c.
Answer: 9:6:10 -
5. Statistics Averages and range
Find the mean, median and range of: 26, 93, 46, 72, 71, 37, 72
Answer: Mean = 59.6, Median = 71, Range = 67