Keystones — Capstone
Five GCSE retrieval questions · 25 June 2016 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √48
Answer: 4√3 -
2. Algebra Completing the square
Complete the square: 4x² - 48x - 3
Answer: 4(x - 6)² - 147 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 14cm, b = 30cm, angle = 49°. Give your answer to 2 decimal places
Answer: 158.49cm² -
4. Ratio Combining two ratios
a:b is 2:9 and b:c is 5:7. Find a:b:c in its simplest form.
Answer: 10:45:63 -
5. Statistics Averages and range
Find the mean, median and range of: 73, 49, 76, 40, 97, 34, 84. Give your answer to 2 decimal places
Answer: Mean = 64.71, Median = 73, Range = 63