Keystones — Capstone
Five GCSE retrieval questions · 20 July 2017 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: 5√63
Answer: 15√7 -
2. Algebra Completing the square
Complete the square: 2x² + 4x - 6
Answer: 2(x + 1)² - 8 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 28cm, b = 30cm, angle = 41°. Give your answer to 2 decimal places
Answer: 275.54cm² -
4. Ratio Combining two ratios
a:b is 1:8 and b:c is 7:5. Find a:b:c in its simplest form.
Answer: 7:56:40 -
5. Statistics Averages and range
Find the mean, median and range of: 22, 66, 93, 89, 17, 33, 88, 30
Answer: Mean = 54.75, Median = 49.5, Range = 76