Keystones — Capstone
Five GCSE retrieval questions · 3 May 2013 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √700
Answer: 10√7 -
2. Algebra Completing the square
Complete the square: x² + x - 6
Answer: (x + 1⁄2)² - 25⁄4 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 22cm, b = 26cm, angle = 53°. Give your answer to 2 decimal places
Answer: 228.41cm² -
4. Ratio Combining two ratios
a:b is 1:7 and b:c is 3:8. Find a:b:c in its simplest form.
Answer: 3:21:56 -
5. Statistics Averages and range
Find the mean, median and range of: 97, 21, 12, 84, 18, 45, 32, 84. Give your answer to 2 decimal places
Answer: Mean = 49.13, Median = 38.5, Range = 85