Keystones — Capstone
Five GCSE retrieval questions · 16 November 2016 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: 4√32
Answer: 16√2 -
2. Algebra Completing the square
Complete the square: x² + 3x - 6
Answer: (x + 3⁄2)² - 33⁄4 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 29cm, b = 28cm, angle = 57°. Give your answer to 2 decimal places
Answer: 340.5cm² -
4. Ratio Combining two ratios
a:b is 5:4 and b:c is 7:3. Find a:b:c in its simplest form.
Answer: 35:28:12 -
5. Statistics Averages and range
Find the mean, median and range of: 32, 98, 30, 14, 15, 40, 27, 21, 23. Give your answer to 2 decimal places
Answer: Mean = 33.33, Median = 27, Range = 84