Keystones — Capstone
Five GCSE retrieval questions · 23 June 2017 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √896
Answer: 8√14 -
2. Algebra Completing the square
Complete the square: 4x² - 24x - 12
Answer: 4(x - 3)² - 48 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 14cm, b = 19cm, angle = 70°. Give your answer to 2 decimal places
Answer: 124.98cm² -
4. Ratio Combining two ratios
a:b is 7:3 and b:c is 2:1. Find a:b:c in its simplest form.
Answer: 14:6:3 -
5. Statistics Averages and range
Find the mean, median and range of: 35, 90, 54, 77, 18, 28, 12, 59, 95
Answer: Mean = 52, Median = 54, Range = 83