Keystones — Capstone
Five GCSE retrieval questions · 21 April 2017 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √396
Answer: 6√11 -
2. Algebra Completing the square
Complete the square: 5x² + 40x + 6
Answer: 5(x + 4)² - 74 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 18cm, b = 26cm, angle = 60°. Give your answer to 2 decimal places
Answer: 202.65cm² -
4. Ratio Combining two ratios
a:b is 9:2 and b:c is 5:3. Find a:b:c in its simplest form.
Answer: 45:10:6 -
5. Statistics Averages and range
Find the mean, median and range of: 20, 68, 62, 46, 40, 24, 97
Answer: Mean = 51, Median = 46, Range = 77