Keystones — Capstone
Five GCSE retrieval questions · 6 March 2018 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √112
Answer: 4√7 -
2. Algebra Completing the square
Complete the square: x² - x + 6
Answer: (x - 1⁄2)² + 23⁄4 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 13cm, b = 25cm, angle = 56°. Give your answer to 2 decimal places
Answer: 134.72cm² -
4. Ratio Combining two ratios
a:b is 7:9 and b:c is 8:5. Find a:b:c in its simplest form.
Answer: 56:72:45 -
5. Statistics Averages and range
Find the mean, median and range of: 37, 31, 15, 79, 42, 55, 40, 19
Answer: Mean = 39.75, Median = 38.5, Range = 64