Keystones — Capstone
Five GCSE retrieval questions · 29 December 2017 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: 5√44
Answer: 10√11 -
2. Algebra Completing the square
Complete the square: x² - 3x - 5
Answer: (x - 3⁄2)² - 29⁄4 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 26cm, b = 19cm, angle = 48°. Give your answer to 2 decimal places
Answer: 183.56cm² -
4. Ratio Combining two ratios
a:b is 3:7 and b:c is 3:4. Find a:b:c in its simplest form.
Answer: 9:21:28 -
5. Statistics Averages and range
Find the mean, median and range of: 61, 32, 93, 64, 86, 69, 19, 80
Answer: Mean = 63, Median = 66.5, Range = 74