Keystones — Capstone
Five GCSE retrieval questions · 26 June 2016 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: 5√96
Answer: 20√6 -
2. Algebra Completing the square
Complete the square: x² + 11x + 6
Answer: (x + 11⁄2)² - 97⁄4 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 28cm, b = 24cm, angle = 44°. Give your answer to 2 decimal places
Answer: 233.41cm² -
4. Ratio Combining two ratios
a:b is 5:3 and b:c is 2:9. Find a:b:c in its simplest form.
Answer: 10:6:27 -
5. Statistics Averages and range
Find the mean, median and range of: 100, 42, 84, 14, 51, 57, 55. Give your answer to 2 decimal places
Answer: Mean = 57.57, Median = 55, Range = 86