Keystones — Capstone
Five GCSE retrieval questions · 29 August 2013 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √891
Answer: 9√11 -
2. Algebra Completing the square
Complete the square: x² + 5x + 2
Answer: (x + 5⁄2)² - 17⁄4 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 28cm, b = 14cm, angle = 60°. Give your answer to 2 decimal places
Answer: 169.74cm² -
4. Ratio Combining two ratios
a:b is 7:8 and b:c is 5:8. Find a:b:c in its simplest form.
Answer: 35:40:64 -
5. Statistics Averages and range
Find the mean, median and range of: 60, 55, 61, 65, 83, 62, 11. Give your answer to 2 decimal places
Answer: Mean = 56.71, Median = 61, Range = 72