Keystones — Capstone
Five GCSE retrieval questions · 31 May 2016 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √735
Answer: 7√15 -
2. Algebra Completing the square
Complete the square: x² + 11x + 11
Answer: (x + 11⁄2)² - 77⁄4 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 12cm, b = 14cm, angle = 40°. Give your answer to 2 decimal places
Answer: 53.99cm² -
4. Ratio Combining two ratios
a:b is 3:8 and b:c is 3:5. Find a:b:c in its simplest form.
Answer: 9:24:40 -
5. Statistics Averages and range
Find the mean, median and range of: 34, 47, 75, 91, 90, 49, 27
Answer: Mean = 59, Median = 49, Range = 64