Keystones — Capstone
Five GCSE retrieval questions · 14 August 2016 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: 2√24
Answer: 4√6 -
2. Algebra Completing the square
Complete the square: 5x² - 20x - 2
Answer: 5(x - 2)² - 22 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 30cm, b = 20cm, angle = 71°. Give your answer to 2 decimal places
Answer: 283.66cm² -
4. Ratio Combining two ratios
a:b is 8:3 and b:c is 7:9. Find a:b:c in its simplest form.
Answer: 56:21:27 -
5. Statistics Averages and range
Find the mean, median and range of: 75, 27, 33, 47, 18, 44, 78
Answer: Mean = 46, Median = 44, Range = 60