Keystones — Capstone
Five GCSE retrieval questions · 1 May 2011 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: 2√24
Answer: 4√6 -
2. Algebra Completing the square
Complete the square: 5x² - 10x - 2
Answer: 5(x - 1)² - 7 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 24cm, b = 29cm, angle = 52°. Give your answer to 2 decimal places
Answer: 274.23cm² -
4. Ratio Combining two ratios
a:b is 3:5 and b:c is 6:5. Find a:b:c in its simplest form.
Answer: 18:30:25 -
5. Statistics Averages and range
Find the mean, median and range of: 40, 12, 37, 92, 56, 59, 68
Answer: Mean = 52, Median = 56, Range = 80