Keystones — Capstone
Five GCSE retrieval questions · 31 December 2016 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: 4√176
Answer: 16√11 -
2. Algebra Completing the square
Complete the square: 4x² + 24x - 10
Answer: 4(x + 3)² - 46 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 26cm, b = 21cm, angle = 47°. Give your answer to 2 decimal places
Answer: 199.66cm² -
4. Ratio Combining two ratios
a:b is 3:7 and b:c is 3:8. Find a:b:c in its simplest form.
Answer: 9:21:56 -
5. Statistics Averages and range
Find the mean, median and range of: 12, 84, 63, 45, 52, 48, 78, 67. Give your answer to 2 decimal places
Answer: Mean = 56.13, Median = 57.5, Range = 72