Keystones — Capstone
Five GCSE retrieval questions · 11 June 2016 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: 5√160
Answer: 20√10 -
2. Algebra Completing the square
Complete the square: 2x² - 4x - 8
Answer: 2(x - 1)² - 10 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 19cm, b = 14cm, angle = 67°. Give your answer to 2 decimal places
Answer: 122.43cm² -
4. Ratio Combining two ratios
a:b is 8:7 and b:c is 8:9. Find a:b:c in its simplest form.
Answer: 64:56:63 -
5. Statistics Averages and range
Find the mean, median and range of: 27, 55, 92, 73, 87, 48, 96, 51, 51. Give your answer to 2 decimal places
Answer: Mean = 64.44, Median = 55, Range = 69