Keystones — Capstone
Five GCSE retrieval questions · 11 January 2017 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √147
Answer: 7√3 -
2. Algebra Completing the square
Complete the square: x² - x + 10
Answer: (x - 1⁄2)² + 39⁄4 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 22cm, b = 18cm, angle = 48°. Give your answer to 2 decimal places
Answer: 147.14cm² -
4. Ratio Combining two ratios
a:b is 9:8 and b:c is 5:1. Find a:b:c in its simplest form.
Answer: 45:40:8 -
5. Statistics Averages and range
Find the mean, median and range of: 30, 85, 67, 34, 56, 98, 92, 46
Answer: Mean = 63.5, Median = 61.5, Range = 68