Keystones — Capstone
Five GCSE retrieval questions · 16 November 2013 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: 5√90
Answer: 15√10 -
2. Algebra Completing the square
Complete the square: 4x² - 16x + 3
Answer: 4(x - 2)² - 13 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 27cm, b = 23cm, angle = 58°. Give your answer to 2 decimal places
Answer: 263.32cm² -
4. Ratio Combining two ratios
a:b is 3:2 and b:c is 3:1. Find a:b:c in its simplest form.
Answer: 9:6:2 -
5. Statistics Averages and range
Find the mean, median and range of: 22, 59, 50, 91, 96, 37, 26, 67
Answer: Mean = 56, Median = 54.5, Range = 74