Keystones — Capstone
Five GCSE retrieval questions · 19 May 2016 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: 3√28
Answer: 6√7 -
2. Algebra Completing the square
Complete the square: 4x² - 48x + 4
Answer: 4(x - 6)² - 140 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 13cm, b = 16cm, angle = 43°. Give your answer to 2 decimal places
Answer: 70.93cm² -
4. Ratio Combining two ratios
a:b is 2:7 and b:c is 5:7. Find a:b:c in its simplest form.
Answer: 10:35:49 -
5. Statistics Averages and range
Find the mean, median and range of: 85, 70, 91, 10, 46, 64, 67. Give your answer to 2 decimal places
Answer: Mean = 61.86, Median = 67, Range = 81