Keystones — Capstone
Five GCSE retrieval questions · 29 August 2010 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √704
Answer: 8√11 -
2. Algebra Completing the square
Complete the square: 3x² - 24x + 11
Answer: 3(x - 4)² - 37 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 23cm, b = 29cm, angle = 64°. Give your answer to 2 decimal places
Answer: 299.75cm² -
4. Ratio Combining two ratios
a:b is 5:9 and b:c is 4:5. Find a:b:c in its simplest form.
Answer: 20:36:45 -
5. Statistics Averages and range
Find the mean, median and range of: 42, 82, 35, 67, 48, 22, 68, 16, 27. Give your answer to 2 decimal places
Answer: Mean = 45.22, Median = 42, Range = 66