Keystones — Capstone
Five GCSE retrieval questions · 30 August 2015 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √32
Answer: 4√2 -
2. Algebra Completing the square
Complete the square: x² + 5x
Answer: (x + 5⁄2)² - 25⁄4 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 16cm, b = 29cm, angle = 79°. Give your answer to 2 decimal places
Answer: 227.74cm² -
4. Ratio Combining two ratios
a:b is 2:7 and b:c is 4:5. Find a:b:c in its simplest form.
Answer: 8:28:35 -
5. Statistics Averages and range
Find the mean, median and range of: 19, 74, 87, 76, 36, 86, 14
Answer: Mean = 56, Median = 74, Range = 73