Keystones — Capstone
Five GCSE retrieval questions · 24 June 2016 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √32
Answer: 4√2 -
2. Algebra Completing the square
Complete the square: 5x² + 20x - 15
Answer: 5(x + 2)² - 35 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 30cm, b = 29cm, angle = 44°. Give your answer to 2 decimal places
Answer: 302.18cm² -
4. Ratio Combining two ratios
a:b is 5:6 and b:c is 4:3. Find a:b:c in its simplest form.
Answer: 10:12:9 -
5. Statistics Averages and range
Find the mean, median and range of: 50, 99, 44, 65, 86, 68, 11. Give your answer to 2 decimal places
Answer: Mean = 60.43, Median = 65, Range = 88