Keystones — Capstone
Five GCSE retrieval questions · 17 December 2013 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: 2√160
Answer: 8√10 -
2. Algebra Completing the square
Complete the square: 3x² - 36x - 6
Answer: 3(x - 6)² - 114 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 27cm, b = 16cm, angle = 66°. Give your answer to 2 decimal places
Answer: 197.33cm² -
4. Ratio Combining two ratios
a:b is 5:8 and b:c is 9:5. Find a:b:c in its simplest form.
Answer: 45:72:40 -
5. Statistics Averages and range
Find the mean, median and range of: 65, 79, 31, 83, 92, 53, 14. Give your answer to 2 decimal places
Answer: Mean = 59.57, Median = 65, Range = 78