Keystones — Capstone
Five GCSE retrieval questions · 20 April 2015 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √637
Answer: 7√13 -
2. Algebra Completing the square
Complete the square: x² + x - 7
Answer: (x + 1⁄2)² - 29⁄4 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 19cm, b = 30cm, angle = 65°. Give your answer to 2 decimal places
Answer: 258.3cm² -
4. Ratio Combining two ratios
a:b is 2:5 and b:c is 2:9. Find a:b:c in its simplest form.
Answer: 4:10:45 -
5. Statistics Averages and range
Find the mean, median and range of: 97, 37, 51, 25, 82, 96, 35, 48. Give your answer to 2 decimal places
Answer: Mean = 58.88, Median = 49.5, Range = 72