Keystones — Capstone
Five GCSE retrieval questions · 14 June 2014 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: 5√96
Answer: 20√6 -
2. Algebra Completing the square
Complete the square: 5x² - 30x + 1
Answer: 5(x - 3)² - 44 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 21cm, b = 23cm, angle = 62°. Give your answer to 2 decimal places
Answer: 213.23cm² -
4. Ratio Combining two ratios
a:b is 4:5 and b:c is 6:5. Find a:b:c in its simplest form.
Answer: 24:30:25 -
5. Statistics Averages and range
Find the mean, median and range of: 44, 15, 72, 35, 41, 42, 76, 91
Answer: Mean = 52, Median = 43, Range = 76