Keystones — Capstone
Five GCSE retrieval questions · 27 January 2012 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: 3√40
Answer: 6√10 -
2. Algebra Completing the square
Complete the square: 3x² + 36x - 11
Answer: 3(x + 6)² - 119 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 18cm, b = 13cm, angle = 68°. Give your answer to 2 decimal places
Answer: 108.48cm² -
4. Ratio Combining two ratios
a:b is 3:5 and b:c is 3:2. Find a:b:c in its simplest form.
Answer: 9:15:10 -
5. Statistics Averages and range
Find the mean, median and range of: 71, 93, 50, 55, 29, 55, 31, 58
Answer: Mean = 55.25, Median = 55, Range = 64