Keystones — Capstone
Five GCSE retrieval questions · 7 March 2018 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √504
Answer: 6√14 -
2. Algebra Completing the square
Complete the square: x² - x - 8
Answer: (x - 1⁄2)² - 33⁄4 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 14cm, b = 17cm, angle = 55°. Give your answer to 2 decimal places
Answer: 97.48cm² -
4. Ratio Combining two ratios
a:b is 3:4 and b:c is 6:7. Find a:b:c in its simplest form.
Answer: 9:12:14 -
5. Statistics Averages and range
Find the mean, median and range of: 39, 94, 86, 80, 49, 97, 24
Answer: Mean = 67, Median = 80, Range = 73