Keystones — Capstone
Five GCSE retrieval questions · 30 November 2016 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: 3√96
Answer: 12√6 -
2. Algebra Completing the square
Complete the square: 3x² - 18x - 15
Answer: 3(x - 3)² - 42 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 12cm, b = 19cm, angle = 53°. Give your answer to 2 decimal places
Answer: 91.04cm² -
4. Ratio Combining two ratios
a:b is 7:8 and b:c is 7:8. Find a:b:c in its simplest form.
Answer: 49:56:64 -
5. Statistics Averages and range
Find the mean, median and range of: 79, 93, 31, 90, 26, 75, 51, 89
Answer: Mean = 66.75, Median = 77, Range = 67