Keystones — Capstone
Five GCSE retrieval questions · 17 April 2016 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: 5√27
Answer: 15√3 -
2. Algebra Completing the square
Complete the square: 4x² + 48x - 11
Answer: 4(x + 6)² - 155 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 17cm, b = 19cm, angle = 67°. Give your answer to 2 decimal places
Answer: 148.66cm² -
4. Ratio Combining two ratios
a:b is 8:3 and b:c is 7:4. Find a:b:c in its simplest form.
Answer: 56:21:12 -
5. Statistics Averages and range
Find the mean, median and range of: 62, 53, 95, 63, 97, 34, 29. Give your answer to 2 decimal places
Answer: Mean = 61.86, Median = 62, Range = 68