Keystones — Capstone
Five GCSE retrieval questions · 6 May 2013 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √343
Answer: 7√7 -
2. Algebra Completing the square
Complete the square: x² - 11x + 8
Answer: (x - 11⁄2)² - 89⁄4 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 27cm, b = 13cm, angle = 68°. Give your answer to 2 decimal places
Answer: 162.72cm² -
4. Ratio Combining two ratios
a:b is 8:9 and b:c is 2:1. Find a:b:c in its simplest form.
Answer: 16:18:9 -
5. Statistics Averages and range
Find the mean, median and range of: 11, 22, 25, 73, 39, 90, 43, 50. Give your answer to 2 decimal places
Answer: Mean = 44.13, Median = 41, Range = 79