Keystones — Capstone
Five GCSE retrieval questions · 15 July 2016 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √735
Answer: 7√15 -
2. Algebra Completing the square
Complete the square: x² - 5x + 1
Answer: (x - 5⁄2)² - 21⁄4 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 13cm, b = 17cm, angle = 61°. Give your answer to 2 decimal places
Answer: 96.65cm² -
4. Ratio Combining two ratios
a:b is 2:7 and b:c is 5:8. Find a:b:c in its simplest form.
Answer: 10:35:56 -
5. Statistics Averages and range
Find the mean, median and range of: 62, 35, 51, 73, 75, 10, 95. Give your answer to 2 decimal places
Answer: Mean = 57.29, Median = 62, Range = 85