Keystones — Capstone
Five GCSE retrieval questions · 15 August 2017 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: 4√27
Answer: 12√3 -
2. Algebra Completing the square
Complete the square: 4x² + 16x - 1
Answer: 4(x + 2)² - 17 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 15cm, b = 29cm, angle = 64°. Give your answer to 2 decimal places
Answer: 195.49cm² -
4. Ratio Combining two ratios
a:b is 2:5 and b:c is 7:6. Find a:b:c in its simplest form.
Answer: 14:35:30 -
5. Statistics Averages and range
Find the mean, median and range of: 89, 14, 31, 95, 95, 25, 88, 40, 99
Answer: Mean = 64, Median = 88, Range = 85