Keystones — Capstone
Five GCSE retrieval questions · 3 July 2012 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √384
Answer: 8√6 -
2. Algebra Completing the square
Complete the square: 3x² - 12x + 1
Answer: 3(x - 2)² - 11 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 24cm, b = 18cm, angle = 60°. Give your answer to 2 decimal places
Answer: 187.06cm² -
4. Ratio Combining two ratios
a:b is 1:6 and b:c is 5:1. Find a:b:c in its simplest form.
Answer: 5:30:6 -
5. Statistics Averages and range
Find the mean, median and range of: 92, 67, 69, 30, 18, 63, 94. Give your answer to 2 decimal places
Answer: Mean = 61.86, Median = 67, Range = 76