Keystones — Capstone
Five GCSE retrieval questions · 24 September 2013 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: 5√48
Answer: 20√3 -
2. Algebra Completing the square
Complete the square: 4x² - 24x - 1
Answer: 4(x - 3)² - 37 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 14cm, b = 24cm, angle = 61°. Give your answer to 2 decimal places
Answer: 146.94cm² -
4. Ratio Combining two ratios
a:b is 2:3 and b:c is 5:1. Find a:b:c in its simplest form.
Answer: 10:15:3 -
5. Statistics Averages and range
Find the mean, median and range of: 46, 65, 61, 75, 81, 60, 77, 81
Answer: Mean = 68.25, Median = 70, Range = 35