Keystones — Capstone
Five GCSE retrieval questions · 12 August 2013 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: 5√12
Answer: 10√3 -
2. Algebra Completing the square
Complete the square: 5x² + 50x + 6
Answer: 5(x + 5)² - 119 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 26cm, b = 24cm, angle = 59°. Give your answer to 2 decimal places
Answer: 267.44cm² -
4. Ratio Combining two ratios
a:b is 7:4 and b:c is 7:6. Find a:b:c in its simplest form.
Answer: 49:28:24 -
5. Statistics Averages and range
Find the mean, median and range of: 92, 56, 49, 92, 73, 75, 38, 45, 92
Answer: Mean = 68, Median = 73, Range = 54