Keystones — Capstone
Five GCSE retrieval questions · 17 November 2010 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: 3√48
Answer: 12√3 -
2. Algebra Completing the square
Complete the square: 4x² + 16x + 14
Answer: 4(x + 2)² - 2 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 24cm, b = 13cm, angle = 60°. Give your answer to 2 decimal places
Answer: 135.cm² -
4. Ratio Combining two ratios
a:b is 8:3 and b:c is 7:8. Find a:b:c in its simplest form.
Answer: 56:21:24 -
5. Statistics Averages and range
Find the mean, median and range of: 37, 16, 41, 52, 40, 35, 69. Give your answer to 2 decimal places
Answer: Mean = 41.43, Median = 40, Range = 53