Keystones — Capstone
Five GCSE retrieval questions · 23 March 2013 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √684
Answer: 6√19 -
2. Algebra Completing the square
Complete the square: 4x² - 8x + 3
Answer: 4(x - 1)² - 1 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 26cm, b = 15cm, angle = 47°. Give your answer to 2 decimal places
Answer: 142.61cm² -
4. Ratio Combining two ratios
a:b is 1:5 and b:c is 4:3. Find a:b:c in its simplest form.
Answer: 4:20:15 -
5. Statistics Averages and range
Find the mean, median and range of: 38, 90, 96, 100, 24, 49, 71, 17. Give your answer to 2 decimal places
Answer: Mean = 60.63, Median = 60, Range = 83