Keystones — Capstone
Five GCSE retrieval questions · 25 December 2016 · 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 - 24x + 5
Answer: 4(x - 3)² - 31 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 23cm, b = 19cm, angle = 54°. Give your answer to 2 decimal places
Answer: 176.77cm² -
4. Ratio Combining two ratios
a:b is 1:8 and b:c is 5:4. Find a:b:c in its simplest form.
Answer: 5:40:32 -
5. Statistics Averages and range
Find the mean, median and range of: 92, 94, 82, 44, 83, 56, 54, 90. Give your answer to 2 decimal places
Answer: Mean = 74.38, Median = 82.5, Range = 50