Keystones — Capstone
Five GCSE retrieval questions · 20 December 2013 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √363
Answer: 11√3 -
2. Algebra Completing the square
Complete the square: 4x² - 16x + 11
Answer: 4(x - 2)² - 5 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 13cm, b = 14cm, angle = 58°. Give your answer to 2 decimal places
Answer: 77.17cm² -
4. Ratio Combining two ratios
a:b is 5:7 and b:c is 9:2. Find a:b:c in its simplest form.
Answer: 45:63:14 -
5. Statistics Averages and range
Find the mean, median and range of: 14, 93, 24, 44, 96, 29, 56. Give your answer to 2 decimal places
Answer: Mean = 50.86, Median = 44, Range = 82