Keystones — Capstone
Five GCSE retrieval questions · 26 May 2016 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: 4√125
Answer: 20√5 -
2. Algebra Completing the square
Complete the square: 4x² - 24x + 2
Answer: 4(x - 3)² - 34 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 17cm, b = 26cm, angle = 56°. Give your answer to 2 decimal places
Answer: 183.22cm² -
4. Ratio Combining two ratios
a:b is 7:8 and b:c is 3:2. Find a:b:c in its simplest form.
Answer: 21:24:16 -
5. Statistics Averages and range
Find the mean, median and range of: 91, 25, 81, 26, 93, 94, 48, 52, 54. Give your answer to 2 decimal places
Answer: Mean = 62.67, Median = 54, Range = 69