Keystones — Capstone
Five GCSE retrieval questions · 23 June 2016 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √847
Answer: 11√7 -
2. Algebra Completing the square
Complete the square: x² - 5x
Answer: (x - 5⁄2)² - 25⁄4 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 14cm, b = 15cm, angle = 43°. Give your answer to 2 decimal places
Answer: 71.61cm² -
4. Ratio Combining two ratios
a:b is 2:3 and b:c is 7:3. Find a:b:c in its simplest form.
Answer: 14:21:9 -
5. Statistics Averages and range
Find the mean, median and range of: 58, 57, 89, 29, 62, 13, 71, 87
Answer: Mean = 58.25, Median = 60, Range = 76