Keystones — Capstone
Five GCSE retrieval questions · 29 May 2016 · 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 - 30x - 13
Answer: 3(x - 5)² - 88 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 16cm, b = 27cm, angle = 43°. Give your answer to 2 decimal places
Answer: 147.31cm² -
4. Ratio Combining two ratios
a:b is 8:3 and b:c is 4:1. Find a:b:c in its simplest form.
Answer: 32:12:3 -
5. Statistics Averages and range
Find the mean, median and range of: 63, 18, 89, 44, 27, 28, 79, 41, 87. Give your answer to 2 decimal places
Answer: Mean = 52.89, Median = 44, Range = 71