Keystones — Capstone
Five GCSE retrieval questions · 17 August 2017 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: 3√112
Answer: 12√7 -
2. Algebra Completing the square
Complete the square: 2x² - 24x + 1
Answer: 2(x - 6)² - 71 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 19cm, b = 30cm, angle = 43°. Give your answer to 2 decimal places
Answer: 194.37cm² -
4. Ratio Combining two ratios
a:b is 9:2 and b:c is 3:7. Find a:b:c in its simplest form.
Answer: 27:6:14 -
5. Statistics Averages and range
Find the mean, median and range of: 23, 29, 66, 90, 19, 67, 10, 56, 28. Give your answer to 2 decimal places
Answer: Mean = 43.11, Median = 29, Range = 80