Keystones — Capstone
Five GCSE retrieval questions · 2 November 2012 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: 4√160
Answer: 16√10 -
2. Algebra Completing the square
Complete the square: 3x² - 36x + 3
Answer: 3(x - 6)² - 105 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 26cm, b = 28cm, angle = 61°. Give your answer to 2 decimal places
Answer: 318.36cm² -
4. Ratio Combining two ratios
a:b is 2:7 and b:c is 2:7. Find a:b:c in its simplest form.
Answer: 4:14:49 -
5. Statistics Averages and range
Find the mean, median and range of: 76, 98, 97, 35, 86, 16, 92. Give your answer to 2 decimal places
Answer: Mean = 71.43, Median = 86, Range = 82