Keystones — Capstone
Five GCSE retrieval questions · 10 April 2021 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √75
Answer: 5√3 -
2. Algebra Completing the square
Complete the square: x² + 3x
Answer: (x + 1.5)² - 2.25 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 29cm, b = 14cm, angle = 73°
Answer: 194.cm² -
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: 69, 34, 67, 15, 25, 76, 98, 90
Answer: Mean = 59.3, Median = 69, Range = 83