Keystones — Capstone
Five GCSE retrieval questions · 17 May 2014 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √792
Answer: 6√22 -
2. Algebra Completing the square
Complete the square: 2x² - 20x - 7
Answer: 2(x - 5)² - 57 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 28cm, b = 19cm, angle = 64°. Give your answer to 2 decimal places
Answer: 239.08cm² -
4. Ratio Combining two ratios
a:b is 1:6 and b:c is 5:9. Find a:b:c in its simplest form.
Answer: 5:30:54 -
5. Statistics Averages and range
Find the mean, median and range of: 93, 32, 84, 48, 29, 12, 60, 21, 64. Give your answer to 2 decimal places
Answer: Mean = 49.22, Median = 48, Range = 81