Keystones — Capstone
Five GCSE retrieval questions · 13 April 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: x² - x + 11
Answer: (x - 1⁄2)² + 43⁄4 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 17cm, b = 30cm, angle = 67°. Give your answer to 2 decimal places
Answer: 234.73cm² -
4. Ratio Combining two ratios
a:b is 4:7 and b:c is 4:3. Find a:b:c in its simplest form.
Answer: 16:28:21 -
5. Statistics Averages and range
Find the mean, median and range of: 49, 88, 67, 77, 85, 11, 19, 64, 94. Give your answer to 2 decimal places
Answer: Mean = 61.56, Median = 67, Range = 83