Keystones — Capstone
Five GCSE retrieval questions · 1 June 2017 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √891
Answer: 9√11 -
2. Algebra Completing the square
Complete the square: 3x² - 12x - 1
Answer: 3(x - 2)² - 13 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 28cm, b = 12cm, angle = 77°. Give your answer to 2 decimal places
Answer: 163.69cm² -
4. Ratio Combining two ratios
a:b is 4:3 and b:c is 7:3. Find a:b:c in its simplest form.
Answer: 28:21:9 -
5. Statistics Averages and range
Find the mean, median and range of: 42, 49, 60, 46, 70, 75, 11, 68. Give your answer to 2 decimal places
Answer: Mean = 52.63, Median = 54.5, Range = 64