Keystones — Capstone
Five GCSE retrieval questions · 8 April 2017 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √539
Answer: 7√11 -
2. Algebra Completing the square
Complete the square: 3x² - 36x + 7
Answer: 3(x - 6)² - 101 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 18cm, b = 12cm, angle = 77°. Give your answer to 2 decimal places
Answer: 105.23cm² -
4. Ratio Combining two ratios
a:b is 7:8 and b:c is 7:4. Find a:b:c in its simplest form.
Answer: 49:56:32 -
5. Statistics Averages and range
Find the mean, median and range of: 69, 26, 53, 40, 95, 17, 56, 50, 43. Give your answer to 2 decimal places
Answer: Mean = 49.89, Median = 50, Range = 78