Keystones — Capstone
Five GCSE retrieval questions · 15 January 2017 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √567
Answer: 9√7 -
2. Algebra Completing the square
Complete the square: 2x² + 8x + 1
Answer: 2(x + 2)² - 7 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 19cm, b = 16cm, angle = 52°. Give your answer to 2 decimal places
Answer: 119.78cm² -
4. Ratio Combining two ratios
a:b is 7:9 and b:c is 5:4. Find a:b:c in its simplest form.
Answer: 35:45:36 -
5. Statistics Averages and range
Find the mean, median and range of: 60, 22, 94, 41, 48, 62, 58
Answer: Mean = 55, Median = 58, Range = 72