Keystones — Capstone
Five GCSE retrieval questions · 29 September 2017 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: 3√176
Answer: 12√11 -
2. Algebra Completing the square
Complete the square: 4x² + 16x - 6
Answer: 4(x + 2)² - 22 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 14cm, b = 23cm, angle = 59°. Give your answer to 2 decimal places
Answer: 138cm² -
4. Ratio Combining two ratios
a:b is 3:7 and b:c is 2:1. Find a:b:c in its simplest form.
Answer: 6:14:7 -
5. Statistics Averages and range
Find the mean, median and range of: 77, 87, 57, 80, 58, 48, 13, 26, 47. Give your answer to 2 decimal places
Answer: Mean = 54.78, Median = 57, Range = 74