Keystones — Capstone
Five GCSE retrieval questions · 24 July 2014 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √475
Answer: 5√19 -
2. Algebra Completing the square
Complete the square: x² + x + 11
Answer: (x + 1⁄2)² + 43⁄4 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 24cm, b = 29cm, angle = 56°. Give your answer to 2 decimal places
Answer: 288.51cm² -
4. Ratio Combining two ratios
a:b is 7:6 and b:c is 5:1. Find a:b:c in its simplest form.
Answer: 35:30:6 -
5. Statistics Averages and range
Find the mean, median and range of: 39, 77, 83, 55, 46, 44, 26, 94
Answer: Mean = 58, Median = 50.5, Range = 68