Keystones — Capstone
Five GCSE retrieval questions · 26 March 2015 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √96
Answer: 4√6 -
2. Algebra Completing the square
Complete the square: 3x² + 6x
Answer: 3(x + 1)² - 3 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 26cm, b = 23cm, angle = 58°. Give your answer to 2 decimal places
Answer: 253.57cm² -
4. Ratio Combining two ratios
a:b is 4:5 and b:c is 7:3. Find a:b:c in its simplest form.
Answer: 28:35:15 -
5. Statistics Averages and range
Find the mean, median and range of: 38, 62, 19, 71, 13, 48, 48. Give your answer to 2 decimal places
Answer: Mean = 42.71, Median = 48, Range = 58