Keystones — Capstone
Five GCSE retrieval questions · 6 April 2011 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: 4√176
Answer: 16√11 -
2. Algebra Completing the square
Complete the square: x² - 9x + 6
Answer: (x - 9⁄2)² - 57⁄4 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 23cm, b = 14cm, angle = 58°. Give your answer to 2 decimal places
Answer: 136.54cm² -
4. Ratio Combining two ratios
a:b is 4:9 and b:c is 6:1. Find a:b:c in its simplest form.
Answer: 8:18:3 -
5. Statistics Averages and range
Find the mean, median and range of: 37, 73, 72, 33, 79, 44, 18, 60
Answer: Mean = 52, Median = 52, Range = 61