Keystones — Capstone
Five GCSE retrieval questions · 1 June 2014 · 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 - 8x + 10
Answer: 2(x - 2)² + 2 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 19cm, b = 19cm, angle = 79°. Give your answer to 2 decimal places
Answer: 177.18cm² -
4. Ratio Combining two ratios
a:b is 8:5 and b:c is 7:4. Find a:b:c in its simplest form.
Answer: 56:35:20 -
5. Statistics Averages and range
Find the mean, median and range of: 48, 42, 18, 62, 24, 68, 61, 55
Answer: Mean = 47.25, Median = 51.5, Range = 50