Keystones — Capstone
Five GCSE retrieval questions · 27 September 2010 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: 3√44
Answer: 6√11 -
2. Algebra Completing the square
Complete the square: 4x² + 16x + 13
Answer: 4(x + 2)² - 3 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 14cm, b = 12cm, angle = 44°. Give your answer to 2 decimal places
Answer: 58.35cm² -
4. Ratio Combining two ratios
a:b is 9:4 and b:c is 6:1. Find a:b:c in its simplest form.
Answer: 27:12:2 -
5. Statistics Averages and range
Find the mean, median and range of: 12, 88, 84, 51, 39, 97, 50, 84. Give your answer to 2 decimal places
Answer: Mean = 63.13, Median = 67.5, Range = 85