Keystones — Capstone
Five GCSE retrieval questions · 22 April 2013 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √567
Answer: 9√7 -
2. Algebra Completing the square
Complete the square: 2x² - 24x - 15
Answer: 2(x - 6)² - 87 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 27cm, b = 17cm, angle = 62°. Give your answer to 2 decimal places
Answer: 202.64cm² -
4. Ratio Combining two ratios
a:b is 5:4 and b:c is 5:9. Find a:b:c in its simplest form.
Answer: 25:20:36 -
5. Statistics Averages and range
Find the mean, median and range of: 32, 75, 77, 91, 74, 86, 26. Give your answer to 2 decimal places
Answer: Mean = 65.86, Median = 75, Range = 65