Keystones — Capstone
Five GCSE retrieval questions · 28 August 2017 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √96
Answer: 4√6 -
2. Algebra Completing the square
Complete the square: 5x² + 30x - 1
Answer: 5(x + 3)² - 46 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 27cm, b = 26cm, angle = 45°. Give your answer to 2 decimal places
Answer: 248.19cm² -
4. Ratio Combining two ratios
a:b is 1:5 and b:c is 3:2. Find a:b:c in its simplest form.
Answer: 3:15:10 -
5. Statistics Averages and range
Find the mean, median and range of: 66, 95, 32, 26, 91, 11, 51. Give your answer to 2 decimal places
Answer: Mean = 53.14, Median = 51, Range = 84