Keystones — Capstone
Five GCSE retrieval questions · 31 July 2017 · 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: 2x² + 16x - 11
Answer: 2(x + 4)² - 43 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 13cm, b = 25cm, angle = 50°. Give your answer to 2 decimal places
Answer: 124.48cm² -
4. Ratio Combining two ratios
a:b is 3:2 and b:c is 5:8. Find a:b:c in its simplest form.
Answer: 15:10:16 -
5. Statistics Averages and range
Find the mean, median and range of: 17, 33, 84, 49, 34, 38, 98, 77, 86. Give your answer to 2 decimal places
Answer: Mean = 57.33, Median = 49, Range = 81