Keystones — Capstone
Five GCSE retrieval questions · 27 March 2013 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: 3√112
Answer: 12√7 -
2. Algebra Completing the square
Complete the square: 2x² + 12x + 3
Answer: 2(x + 3)² - 15 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 19cm, b = 17cm, angle = 70°. Give your answer to 2 decimal places
Answer: 151.76cm² -
4. Ratio Combining two ratios
a:b is 7:4 and b:c is 5:7. Find a:b:c in its simplest form.
Answer: 35:20:28 -
5. Statistics Averages and range
Find the mean, median and range of: 55, 73, 87, 26, 67, 38, 29. Give your answer to 2 decimal places
Answer: Mean = 53.57, Median = 55, Range = 61