Keystones — Capstone
Five GCSE retrieval questions · 11 July 2013 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: 4√27
Answer: 12√3 -
2. Algebra Completing the square
Complete the square: 4x² - 8x + 13
Answer: 4(x - 1)² + 9 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 30cm, b = 30cm, angle = 40°. Give your answer to 2 decimal places
Answer: 289.25cm² -
4. Ratio Combining two ratios
a:b is 5:9 and b:c is 2:9. Find a:b:c in its simplest form.
Answer: 10:18:81 -
5. Statistics Averages and range
Find the mean, median and range of: 32, 69, 60, 40, 48, 43, 62. Give your answer to 2 decimal places
Answer: Mean = 50.57, Median = 48, Range = 37