Keystones — Capstone
Five GCSE retrieval questions · 1 June 2013 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: 4√8
Answer: 8√2 -
2. Algebra Completing the square
Complete the square: 5x² + 10x + 10
Answer: 5(x + 1)² + 5 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 25cm, b = 17cm, angle = 64°. Give your answer to 2 decimal places
Answer: 190.99cm² -
4. Ratio Combining two ratios
a:b is 7:4 and b:c is 7:2. Find a:b:c in its simplest form.
Answer: 49:28:8 -
5. Statistics Averages and range
Find the mean, median and range of: 94, 69, 76, 42, 65, 25, 87, 41, 30. Give your answer to 2 decimal places
Answer: Mean = 58.78, Median = 65, Range = 69