Keystones — Capstone
Five GCSE retrieval questions · 19 April 2017 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √832
Answer: 8√13 -
2. Algebra Completing the square
Complete the square: x² - 11x
Answer: (x - 11⁄2)² - 121⁄4 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 27cm, b = 23cm, angle = 51°. Give your answer to 2 decimal places
Answer: 241.3cm² -
4. Ratio Combining two ratios
a:b is 1:6 and b:c is 4:5. Find a:b:c in its simplest form.
Answer: 2:12:15 -
5. Statistics Averages and range
Find the mean, median and range of: 29, 70, 76, 55, 13, 80, 44, 13, 77. Give your answer to 2 decimal places
Answer: Mean = 50.78, Median = 55, Range = 67