Keystones — Capstone
Five GCSE retrieval questions · 28 April 2013 · 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: 3x² - 12x + 5
Answer: 3(x - 2)² - 7 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 14cm, b = 26cm, angle = 56°. Give your answer to 2 decimal places
Answer: 150.88cm² -
4. Ratio Combining two ratios
a:b is 4:7 and b:c is 6:7. Find a:b:c in its simplest form.
Answer: 24:42:49 -
5. Statistics Averages and range
Find the mean, median and range of: 39, 81, 90, 70, 20, 94, 82, 38, 83. Give your answer to 2 decimal places
Answer: Mean = 66.33, Median = 81, Range = 74