Keystones — Capstone
Five GCSE retrieval questions · 16 August 2013 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √147
Answer: 7√3 -
2. Algebra Completing the square
Complete the square: 5x² - 60x - 4
Answer: 5(x - 6)² - 184 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 23cm, b = 12cm, angle = 59°. Give your answer to 2 decimal places
Answer: 118.29cm² -
4. Ratio Combining two ratios
a:b is 2:7 and b:c is 2:3. Find a:b:c in its simplest form.
Answer: 4:14:21 -
5. Statistics Averages and range
Find the mean, median and range of: 20, 60, 46, 44, 44, 83, 24. Give your answer to 2 decimal places
Answer: Mean = 45.86, Median = 44, Range = 63