Keystones — Capstone
Five GCSE retrieval questions · 25 September 2016 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √896
Answer: 8√14 -
2. Algebra Completing the square
Complete the square: 5x² + 30x - 9
Answer: 5(x + 3)² - 54 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 29cm, b = 25cm, angle = 64°. Give your answer to 2 decimal places
Answer: 325.81cm² -
4. Ratio Combining two ratios
a:b is 2:3 and b:c is 7:9. Find a:b:c in its simplest form.
Answer: 14:21:27 -
5. Statistics Averages and range
Find the mean, median and range of: 43, 69, 18, 96, 84, 34, 65. Give your answer to 2 decimal places
Answer: Mean = 58.43, Median = 65, Range = 78