Keystones — Capstone
Five GCSE retrieval questions · 1 March 2018 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √567
Answer: 9√7 -
2. Algebra Completing the square
Complete the square: x² - 3x - 2
Answer: (x - 3⁄2)² - 17⁄4 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 20cm, b = 30cm, angle = 61°. Give your answer to 2 decimal places
Answer: 262.39cm² -
4. Ratio Combining two ratios
a:b is 8:5 and b:c is 4:9. Find a:b:c in its simplest form.
Answer: 32:20:45 -
5. Statistics Averages and range
Find the mean, median and range of: 91, 29, 60, 22, 25, 42, 15, 65. Give your answer to 2 decimal places
Answer: Mean = 43.63, Median = 35.5, Range = 76