Keystones — Capstone
Five GCSE retrieval questions · 2 June 2011 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: 2√44
Answer: 4√11 -
2. Algebra Completing the square
Complete the square: 5x² - 60x - 6
Answer: 5(x - 6)² - 186 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 19cm, b = 17cm, angle = 66°. Give your answer to 2 decimal places
Answer: 147.54cm² -
4. Ratio Combining two ratios
a:b is 5:9 and b:c is 7:6. Find a:b:c in its simplest form.
Answer: 35:63:54 -
5. Statistics Averages and range
Find the mean, median and range of: 10, 13, 18, 11, 36, 60, 98, 52, 30. Give your answer to 2 decimal places
Answer: Mean = 36.44, Median = 30, Range = 88