Keystones — Capstone
Five GCSE retrieval questions · 18 June 2017 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √432
Answer: 12√3 -
2. Algebra Completing the square
Complete the square: 3x² + 6x
Answer: 3(x + 1)² - 3 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 29cm, b = 27cm, angle = 60°. Give your answer to 2 decimal places
Answer: 339.05cm² -
4. Ratio Combining two ratios
a:b is 1:2 and b:c is 3:2. Find a:b:c in its simplest form.
Answer: 3:6:4 -
5. Statistics Averages and range
Find the mean, median and range of: 76, 55, 40, 56, 69, 30, 11. Give your answer to 2 decimal places
Answer: Mean = 48.14, Median = 55, Range = 65