Keystones — Capstone
Five GCSE retrieval questions · 29 August 2017 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: 3√32
Answer: 12√2 -
2. Algebra Completing the square
Complete the square: 2x² - 12x - 14
Answer: 2(x - 3)² - 32 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 21cm, b = 18cm, angle = 49°. Give your answer to 2 decimal places
Answer: 142.64cm² -
4. Ratio Combining two ratios
a:b is 6:5 and b:c is 3:4. Find a:b:c in its simplest form.
Answer: 18:15:20 -
5. Statistics Averages and range
Find the mean, median and range of: 81, 13, 54, 42, 54, 57, 22, 79, 12
Answer: Mean = 46, Median = 54, Range = 69