Keystones — Capstone
Five GCSE retrieval questions · 28 June 2013 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √300
Answer: 10√3 -
2. Algebra Completing the square
Complete the square: 4x² - 24x + 3
Answer: 4(x - 3)² - 33 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 27cm, b = 24cm, angle = 47°. Give your answer to 2 decimal places
Answer: 236.96cm² -
4. Ratio Combining two ratios
a:b is 3:4 and b:c is 6:5. Find a:b:c in its simplest form.
Answer: 9:12:10 -
5. Statistics Averages and range
Find the mean, median and range of: 44, 48, 20, 24, 91, 30, 98, 64. Give your answer to 2 decimal places
Answer: Mean = 52.38, Median = 46, Range = 78