Keystones — Capstone
Five GCSE retrieval questions · 31 August 2017 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: 2√40
Answer: 4√10 -
2. Algebra Completing the square
Complete the square: 3x² + 24x - 1
Answer: 3(x + 4)² - 49 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 18cm, b = 13cm, angle = 40°. Give your answer to 2 decimal places
Answer: 75.21cm² -
4. Ratio Combining two ratios
a:b is 4:3 and b:c is 5:8. Find a:b:c in its simplest form.
Answer: 20:15:24 -
5. Statistics Averages and range
Find the mean, median and range of: 38, 38, 57, 94, 74, 80, 59, 60
Answer: Mean = 62.5, Median = 59.5, Range = 56