Keystones — Capstone
Five GCSE retrieval questions · 28 August 2016 · 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: 3x² - 12x - 2
Answer: 3(x - 2)² - 14 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 13cm, b = 19cm, angle = 62°. Give your answer to 2 decimal places
Answer: 109.04cm² -
4. Ratio Combining two ratios
a:b is 3:4 and b:c is 7:9. Find a:b:c in its simplest form.
Answer: 21:28:36 -
5. Statistics Averages and range
Find the mean, median and range of: 83, 62, 32, 100, 100, 32, 57, 56, 48. Give your answer to 2 decimal places
Answer: Mean = 63.33, Median = 57, Range = 68