Keystones — Capstone
Five GCSE retrieval questions · 15 April 2015 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: 3√96
Answer: 12√6 -
2. Algebra Completing the square
Complete the square: x² + x - 10
Answer: (x + 1⁄2)² - 41⁄4 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 26cm, b = 30cm, angle = 74°. Give your answer to 2 decimal places
Answer: 374.89cm² -
4. Ratio Combining two ratios
a:b is 1:2 and b:c is 3:8. Find a:b:c in its simplest form.
Answer: 3:6:16 -
5. Statistics Averages and range
Find the mean, median and range of: 83, 75, 41, 77, 64, 28, 10, 92, 33. Give your answer to 2 decimal places
Answer: Mean = 55.89, Median = 64, Range = 82