Keystones — Capstone
Five GCSE retrieval questions · 30 October 2017 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: 3√8
Answer: 6√2 -
2. Algebra Completing the square
Complete the square: 3x² - 6x + 14
Answer: 3(x - 1)² + 11 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 28cm, b = 21cm, angle = 41°. Give your answer to 2 decimal places
Answer: 192.88cm² -
4. Ratio Combining two ratios
a:b is 4:9 and b:c is 7:3. Find a:b:c in its simplest form.
Answer: 28:63:27 -
5. Statistics Averages and range
Find the mean, median and range of: 49, 32, 12, 73, 82, 71, 14. Give your answer to 2 decimal places
Answer: Mean = 47.57, Median = 49, Range = 70