Keystones — Capstone
Five GCSE retrieval questions · 14 November 2013 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √704
Answer: 8√11 -
2. Algebra Completing the square
Complete the square: 4x² + 8x - 5
Answer: 4(x + 1)² - 9 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 23cm, b = 16cm, angle = 66°. Give your answer to 2 decimal places
Answer: 168.09cm² -
4. Ratio Combining two ratios
a:b is 1:9 and b:c is 7:8. Find a:b:c in its simplest form.
Answer: 7:63:72 -
5. Statistics Averages and range
Find the mean, median and range of: 81, 55, 41, 23, 42, 64, 50, 20
Answer: Mean = 47, Median = 46, Range = 61