Keystones — Capstone
Five GCSE retrieval questions · 3 June 2012 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: 4√99
Answer: 12√11 -
2. Algebra Completing the square
Complete the square: 5x² + 60x + 14
Answer: 5(x + 6)² - 166 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 26cm, b = 25cm, angle = 59°. Give your answer to 2 decimal places
Answer: 278.58cm² -
4. Ratio Combining two ratios
a:b is 4:9 and b:c is 7:8. Find a:b:c in its simplest form.
Answer: 28:63:72 -
5. Statistics Averages and range
Find the mean, median and range of: 56, 46, 52, 41, 62, 47, 58, 73. Give your answer to 2 decimal places
Answer: Mean = 54.38, Median = 54, Range = 32