Keystones — Capstone
Five GCSE retrieval questions · 2 August 2011 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: 3√63
Answer: 9√7 -
2. Algebra Completing the square
Complete the square: 5x² + 30x + 13
Answer: 5(x + 3)² - 32 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 29cm, b = 23cm, angle = 53°. Give your answer to 2 decimal places
Answer: 266.34cm² -
4. Ratio Combining two ratios
a:b is 1:9 and b:c is 5:7. Find a:b:c in its simplest form.
Answer: 5:45:63 -
5. Statistics Averages and range
Find the mean, median and range of: 45, 24, 90, 55, 84, 85, 15, 52
Answer: Mean = 56.25, Median = 53.5, Range = 75