Keystones — Capstone
Five GCSE retrieval questions · 8 November 2014 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √216
Answer: 6√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 = 22cm, b = 16cm, angle = 49°. Give your answer to 2 decimal places
Answer: 132.83cm² -
4. Ratio Combining two ratios
a:b is 2:9 and b:c is 6:5. Find a:b:c in its simplest form.
Answer: 4:18:15 -
5. Statistics Averages and range
Find the mean, median and range of: 13, 82, 53, 47, 50, 34, 78
Answer: Mean = 51, Median = 50, Range = 69