Keystones — Capstone
Five GCSE retrieval questions · 2 March 2013 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √468
Answer: 6√13 -
2. Algebra Completing the square
Complete the square: 4x² - 24x + 3
Answer: 4(x - 3)² - 33 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 27cm, b = 21cm, angle = 54°. Give your answer to 2 decimal places
Answer: 229.36cm² -
4. Ratio Combining two ratios
a:b is 1:5 and b:c is 4:9. Find a:b:c in its simplest form.
Answer: 4:20:45 -
5. Statistics Averages and range
Find the mean, median and range of: 69, 33, 51, 84, 78, 72, 95, 28, 21
Answer: Mean = 59, Median = 69, Range = 74