Keystones — Capstone
Five GCSE retrieval questions · 2 January 2017 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √288
Answer: 12√2 -
2. Algebra Completing the square
Complete the square: x² - 5x + 3
Answer: (x - 5⁄2)² - 13⁄4 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 16cm, b = 27cm, angle = 62°. Give your answer to 2 decimal places
Answer: 190.72cm² -
4. Ratio Combining two ratios
a:b is 5:7 and b:c is 6:1. Find a:b:c in its simplest form.
Answer: 30:42:7 -
5. Statistics Averages and range
Find the mean, median and range of: 23, 83, 100, 45, 48, 34, 98, 43
Answer: Mean = 59.25, Median = 46.5, Range = 77