Keystones — Capstone
Five GCSE retrieval questions · 23 August 2016 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √350
Answer: 5√14 -
2. Algebra Completing the square
Complete the square: 3x² + 36x - 6
Answer: 3(x + 6)² - 114 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 30cm, b = 26cm, angle = 73°. Give your answer to 2 decimal places
Answer: 372.96cm² -
4. Ratio Combining two ratios
a:b is 4:5 and b:c is 7:5. Find a:b:c in its simplest form.
Answer: 28:35:25 -
5. Statistics Averages and range
Find the mean, median and range of: 84, 62, 95, 14, 31, 75, 51, 17. Give your answer to 2 decimal places
Answer: Mean = 53.63, Median = 56.5, Range = 81