Keystones — Capstone
Five GCSE retrieval questions · 12 August 2014 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: 2√8
Answer: 4√2 -
2. Algebra Completing the square
Complete the square: 4x² - 32x - 2
Answer: 4(x - 4)² - 66 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 26cm, b = 13cm, angle = 64°. Give your answer to 2 decimal places
Answer: 151.9cm² -
4. Ratio Combining two ratios
a:b is 1:8 and b:c is 9:4. Find a:b:c in its simplest form.
Answer: 9:72:32 -
5. Statistics Averages and range
Find the mean, median and range of: 29, 25, 51, 64, 64, 87, 37
Answer: Mean = 51, Median = 51, Range = 62