Keystones — Capstone
Five GCSE retrieval questions · 1 April 2016 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √448
Answer: 8√7 -
2. Algebra Completing the square
Complete the square: x² - x + 8
Answer: (x - 1⁄2)² + 31⁄4 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 28cm, b = 28cm, angle = 40°. Give your answer to 2 decimal places
Answer: 251.97cm² -
4. Ratio Combining two ratios
a:b is 5:4 and b:c is 3:7. Find a:b:c in its simplest form.
Answer: 15:12:28 -
5. Statistics Averages and range
Find the mean, median and range of: 69, 86, 61, 93, 77, 46, 31, 61
Answer: Mean = 65.5, Median = 65, Range = 62