Keystones — Capstone
Five GCSE retrieval questions · 20 April 2012 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: 4√150
Answer: 20√6 -
2. Algebra Completing the square
Complete the square: 4x² + 24x + 11
Answer: 4(x + 3)² - 25 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 29cm, b = 24cm, angle = 67°. Give your answer to 2 decimal places
Answer: 320.34cm² -
4. Ratio Combining two ratios
a:b is 5:6 and b:c is 4:3. Find a:b:c in its simplest form.
Answer: 10:12:9 -
5. Statistics Averages and range
Find the mean, median and range of: 64, 83, 57, 98, 80, 75, 87. Give your answer to 2 decimal places
Answer: Mean = 77.71, Median = 80, Range = 41