Keystones — Capstone
Five GCSE retrieval questions · 14 October 2016 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: 4√40
Answer: 8√10 -
2. Algebra Completing the square
Complete the square: 4x² + 32x + 10
Answer: 4(x + 4)² - 54 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 14cm, b = 17cm, angle = 46°. Give your answer to 2 decimal places
Answer: 85.6cm² -
4. Ratio Combining two ratios
a:b is 1:4 and b:c is 3:1. Find a:b:c in its simplest form.
Answer: 3:12:4 -
5. Statistics Averages and range
Find the mean, median and range of: 62, 43, 94, 32, 50, 44, 35, 24, 28. Give your answer to 2 decimal places
Answer: Mean = 45.78, Median = 43, Range = 70