Keystones — Capstone
Five GCSE retrieval questions · 28 January 2016 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: 4√44
Answer: 8√11 -
2. Algebra Completing the square
Complete the square: 2x² + 24x + 5
Answer: 2(x + 6)² - 67 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 16cm, b = 19cm, angle = 45°. Give your answer to 2 decimal places
Answer: 107.48cm² -
4. Ratio Combining two ratios
a:b is 8:3 and b:c is 5:8. Find a:b:c in its simplest form.
Answer: 40:15:24 -
5. Statistics Averages and range
Find the mean, median and range of: 97, 90, 15, 27, 52, 32, 33, 64
Answer: Mean = 51.25, Median = 42.5, Range = 82