Keystones — Capstone
Five GCSE retrieval questions · 29 May 2013 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √363
Answer: 11√3 -
2. Algebra Completing the square
Complete the square: x² - 3x + 2
Answer: (x - 3⁄2)² - 1⁄4 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 27cm, b = 22cm, angle = 76°. Give your answer to 2 decimal places
Answer: 288.18cm² -
4. Ratio Combining two ratios
a:b is 7:6 and b:c is 5:8. Find a:b:c in its simplest form.
Answer: 35:30:48 -
5. Statistics Averages and range
Find the mean, median and range of: 15, 98, 87, 23, 27, 59, 60, 51, 53. Give your answer to 2 decimal places
Answer: Mean = 52.56, Median = 53, Range = 83