Keystones — Capstone
Five GCSE retrieval questions · 27 May 2017 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: 3√18
Answer: 9√2 -
2. Algebra Completing the square
Complete the square: 3x² - 30x - 4
Answer: 3(x - 5)² - 79 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 29cm, b = 19cm, angle = 67°. Give your answer to 2 decimal places
Answer: 253.6cm² -
4. Ratio Combining two ratios
a:b is 5:7 and b:c is 5:6. Find a:b:c in its simplest form.
Answer: 25:35:42 -
5. Statistics Averages and range
Find the mean, median and range of: 54, 19, 43, 97, 73, 39, 65, 47. Give your answer to 2 decimal places
Answer: Mean = 54.63, Median = 50.5, Range = 78