Keystones — Capstone
Five GCSE retrieval questions · 9 August 2016 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √704
Answer: 8√11 -
2. Algebra Completing the square
Complete the square: 3x² + 24x + 14
Answer: 3(x + 4)² - 34 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 12cm, b = 22cm, angle = 53°. Give your answer to 2 decimal places
Answer: 105.42cm² -
4. Ratio Combining two ratios
a:b is 9:5 and b:c is 3:5. Find a:b:c in its simplest form.
Answer: 27:15:25 -
5. Statistics Averages and range
Find the mean, median and range of: 12, 72, 92, 100, 90, 24, 43, 60, 93. Give your answer to 2 decimal places
Answer: Mean = 65.11, Median = 72, Range = 88