Keystones — Capstone
Five GCSE retrieval questions · 18 June 2012 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √704
Answer: 8√11 -
2. Algebra Completing the square
Complete the square: 4x² - 24x + 1
Answer: 4(x - 3)² - 35 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 16cm, b = 15cm, angle = 77°. Give your answer to 2 decimal places
Answer: 116.92cm² -
4. Ratio Combining two ratios
a:b is 3:5 and b:c is 9:1. Find a:b:c in its simplest form.
Answer: 27:45:5 -
5. Statistics Averages and range
Find the mean, median and range of: 89, 71, 13, 93, 35, 42, 90. Give your answer to 2 decimal places
Answer: Mean = 61.86, Median = 71, Range = 80