Keystones — Capstone
Five GCSE retrieval questions · 11 April 2014 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √684
Answer: 6√19 -
2. Algebra Completing the square
Complete the square: x² - 7x + 10
Answer: (x - 7⁄2)² - 9⁄4 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 13cm, b = 12cm, angle = 59°. Give your answer to 2 decimal places
Answer: 66.86cm² -
4. Ratio Combining two ratios
a:b is 4:3 and b:c is 5:6. Find a:b:c in its simplest form.
Answer: 20:15:18 -
5. Statistics Averages and range
Find the mean, median and range of: 35, 92, 11, 10, 68, 95, 29. Give your answer to 2 decimal places
Answer: Mean = 48.57, Median = 35, Range = 85