Keystones — Capstone
Five GCSE retrieval questions · 19 November 2012 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: 4√12
Answer: 8√3 -
2. Algebra Completing the square
Complete the square: 4x² + 8x + 14
Answer: 4(x + 1)² + 10 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 17cm, b = 26cm, angle = 80°. Give your answer to 2 decimal places
Answer: 217.64cm² -
4. Ratio Combining two ratios
a:b is 5:4 and b:c is 7:2. Find a:b:c in its simplest form.
Answer: 35:28:8 -
5. Statistics Averages and range
Find the mean, median and range of: 71, 68, 35, 82, 23, 26, 60. Give your answer to 2 decimal places
Answer: Mean = 52.14, Median = 60, Range = 59