Keystones — Capstone
Five GCSE retrieval questions · 21 November 2015 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: 4√18
Answer: 12√2 -
2. Algebra Completing the square
Complete the square: 3x² + 24x + 14
Answer: 3(x + 4)² - 34 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 19cm, b = 16cm, angle = 41°. Give your answer to 2 decimal places
Answer: 99.72cm² -
4. Ratio Combining two ratios
a:b is 7:2 and b:c is 7:6. Find a:b:c in its simplest form.
Answer: 49:14:12 -
5. Statistics Averages and range
Find the mean, median and range of: 47, 27, 67, 16, 18, 79, 98, 96
Answer: Mean = 56, Median = 57, Range = 82