Keystones — Capstone
Five GCSE retrieval questions · 4 May 2017 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: 5√40
Answer: 10√10 -
2. Algebra Completing the square
Complete the square: 5x² + 50x - 6
Answer: 5(x + 5)² - 131 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 24cm, b = 20cm, angle = 63°. Give your answer to 2 decimal places
Answer: 213.84cm² -
4. Ratio Combining two ratios
a:b is 2:7 and b:c is 6:5. Find a:b:c in its simplest form.
Answer: 12:42:35 -
5. Statistics Averages and range
Find the mean, median and range of: 61, 90, 42, 28, 55, 26, 39, 21
Answer: Mean = 45.25, Median = 40.5, Range = 69