Keystones — Capstone
Five GCSE retrieval questions · 6 July 2016 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √704
Answer: 8√11 -
2. Algebra Completing the square
Complete the square: x² + 5x - 7
Answer: (x + 5⁄2)² - 53⁄4 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 25cm, b = 30cm, angle = 77°. Give your answer to 2 decimal places
Answer: 365.39cm² -
4. Ratio Combining two ratios
a:b is 8:3 and b:c is 5:2. Find a:b:c in its simplest form.
Answer: 40:15:6 -
5. Statistics Averages and range
Find the mean, median and range of: 52, 90, 50, 96, 47, 19, 12, 66
Answer: Mean = 54, Median = 51, Range = 84