Keystones — Capstone
Five GCSE retrieval questions · 20 January 2014 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: 4√54
Answer: 12√6 -
2. Algebra Completing the square
Complete the square: x² - 5x - 3
Answer: (x - 5⁄2)² - 37⁄4 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 13cm, b = 22cm, angle = 44°. Give your answer to 2 decimal places
Answer: 99.34cm² -
4. Ratio Combining two ratios
a:b is 8:5 and b:c is 4:3. Find a:b:c in its simplest form.
Answer: 32:20:15 -
5. Statistics Averages and range
Find the mean, median and range of: 23, 49, 39, 65, 53, 19, 85, 11
Answer: Mean = 43, Median = 44, Range = 74