Keystones — Capstone
Five GCSE retrieval questions · 18 August 2012 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: 5√275
Answer: 25√11 -
2. Algebra Completing the square
Complete the square: 3x² - 36x + 8
Answer: 3(x - 6)² - 100 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 29cm, b = 27cm, angle = 60°. Give your answer to 2 decimal places
Answer: 339.05cm² -
4. Ratio Combining two ratios
a:b is 1:5 and b:c is 7:1. Find a:b:c in its simplest form.
Answer: 7:35:5 -
5. Statistics Averages and range
Find the mean, median and range of: 41, 74, 50, 22, 79, 95, 29, 54
Answer: Mean = 55.5, Median = 52, Range = 73