Keystones — Capstone
Five GCSE retrieval questions · 15 December 2015 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: 2√176
Answer: 8√11 -
2. Algebra Completing the square
Complete the square: 3x² - 12x + 10
Answer: 3(x - 2)² - 2 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 29cm, b = 30cm, angle = 45°. Give your answer to 2 decimal places
Answer: 307.59cm² -
4. Ratio Combining two ratios
a:b is 8:7 and b:c is 8:5. Find a:b:c in its simplest form.
Answer: 64:56:35 -
5. Statistics Averages and range
Find the mean, median and range of: 52, 59, 55, 98, 30, 75, 87, 60, 78
Answer: Mean = 66, Median = 60, Range = 68