Keystones — Capstone
Five GCSE retrieval questions · 21 May 2014 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √396
Answer: 6√11 -
2. Algebra Completing the square
Complete the square: 2x² - 16x - 12
Answer: 2(x - 4)² - 44 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 20cm, b = 18cm, angle = 64°. Give your answer to 2 decimal places
Answer: 161.78cm² -
4. Ratio Combining two ratios
a:b is 6:7 and b:c is 4:3. Find a:b:c in its simplest form.
Answer: 24:28:21 -
5. Statistics Averages and range
Find the mean, median and range of: 24, 47, 35, 48, 93, 97, 78. Give your answer to 2 decimal places
Answer: Mean = 60.29, Median = 48, Range = 73