Keystones — Capstone
Five GCSE retrieval questions · 17 June 2012 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: 5√44
Answer: 10√11 -
2. Algebra Completing the square
Complete the square: 5x² + 30x + 14
Answer: 5(x + 3)² - 31 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 14cm, b = 12cm, angle = 63°. Give your answer to 2 decimal places
Answer: 74.84cm² -
4. Ratio Combining two ratios
a:b is 8:5 and b:c is 4:5. Find a:b:c in its simplest form.
Answer: 32:20:25 -
5. Statistics Averages and range
Find the mean, median and range of: 27, 52, 67, 81, 43, 40, 88. Give your answer to 2 decimal places
Answer: Mean = 56.86, Median = 52, Range = 61