Keystones — Capstone
Five GCSE retrieval questions · 13 April 2016 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: 3√40
Answer: 6√10 -
2. Algebra Completing the square
Complete the square: 4x² + 40x + 1
Answer: 4(x + 5)² - 99 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 15cm, b = 12cm, angle = 74°. Give your answer to 2 decimal places
Answer: 86.51cm² -
4. Ratio Combining two ratios
a:b is 8:3 and b:c is 2:9. Find a:b:c in its simplest form.
Answer: 16:6:27 -
5. Statistics Averages and range
Find the mean, median and range of: 53, 76, 17, 11, 28, 40, 17. Give your answer to 2 decimal places
Answer: Mean = 34.57, Median = 28, Range = 65