Keystones — Capstone
Five GCSE retrieval questions · 22 November 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 + 36x - 3
Answer: 3(x + 6)² - 111 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 29cm, b = 17cm, angle = 72°. Give your answer to 2 decimal places
Answer: 234.44cm² -
4. Ratio Combining two ratios
a:b is 8:7 and b:c is 3:7. Find a:b:c in its simplest form.
Answer: 24:21:49 -
5. Statistics Averages and range
Find the mean, median and range of: 92, 74, 79, 72, 37, 42, 94, 55. Give your answer to 2 decimal places
Answer: Mean = 68.13, Median = 73, Range = 57