Keystones — Capstone
Five GCSE retrieval questions · 24 April 2016 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: 2√160
Answer: 8√10 -
2. Algebra Completing the square
Complete the square: 4x² - 32x
Answer: 4(x - 4)² - 64 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 23cm, b = 20cm, angle = 61°. Give your answer to 2 decimal places
Answer: 201.16cm² -
4. Ratio Combining two ratios
a:b is 5:4 and b:c is 9:8. Find a:b:c in its simplest form.
Answer: 45:36:32 -
5. Statistics Averages and range
Find the mean, median and range of: 48, 65, 82, 76, 44, 95, 56, 97. Give your answer to 2 decimal places
Answer: Mean = 70.38, Median = 70.5, Range = 53