Keystones — Capstone
Five GCSE retrieval questions · 26 October 2013 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: 2√96
Answer: 8√6 -
2. Algebra Completing the square
Complete the square: 2x² + 16x + 1
Answer: 2(x + 4)² - 31 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 15cm, b = 21cm, angle = 46°. Give your answer to 2 decimal places
Answer: 113.3cm² -
4. Ratio Combining two ratios
a:b is 1:4 and b:c is 6:7. Find a:b:c in its simplest form.
Answer: 3:12:14 -
5. Statistics Averages and range
Find the mean, median and range of: 36, 46, 11, 82, 99, 54, 35, 36. Give your answer to 2 decimal places
Answer: Mean = 49.88, Median = 41, Range = 88