Keystones — Capstone
Five GCSE retrieval questions · 14 June 2016 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: 4√125
Answer: 20√5 -
2. Algebra Completing the square
Complete the square: 4x² + 32x + 13
Answer: 4(x + 4)² - 51 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 29cm, b = 30cm, angle = 60°. Give your answer to 2 decimal places
Answer: 376.72cm² -
4. Ratio Combining two ratios
a:b is 5:6 and b:c is 5:1. Find a:b:c in its simplest form.
Answer: 25:30:6 -
5. Statistics Averages and range
Find the mean, median and range of: 99, 38, 86, 61, 69, 23, 92, 73. Give your answer to 2 decimal places
Answer: Mean = 67.63, Median = 71, Range = 76