Keystones — Capstone
Five GCSE retrieval questions · 29 January 2016 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √896
Answer: 8√14 -
2. Algebra Completing the square
Complete the square: x² + 9x + 4
Answer: (x + 9⁄2)² - 65⁄4 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 26cm, b = 26cm, angle = 71°. Give your answer to 2 decimal places
Answer: 319.59cm² -
4. Ratio Combining two ratios
a:b is 3:2 and b:c is 5:3. Find a:b:c in its simplest form.
Answer: 15:10:6 -
5. Statistics Averages and range
Find the mean, median and range of: 40, 48, 48, 46, 54, 65, 69, 21, 69. Give your answer to 2 decimal places
Answer: Mean = 51.11, Median = 48, Range = 48