Keystones — Capstone
Five GCSE retrieval questions · 6 September 2013 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √32
Answer: 4√2 -
2. Algebra Completing the square
Complete the square: 4x² - 24x + 3
Answer: 4(x - 3)² - 33 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 25cm, b = 29cm, angle = 66°. Give your answer to 2 decimal places
Answer: 331.16cm² -
4. Ratio Combining two ratios
a:b is 1:9 and b:c is 2:7. Find a:b:c in its simplest form.
Answer: 2:18:63 -
5. Statistics Averages and range
Find the mean, median and range of: 58, 81, 28, 69, 73, 54, 13. Give your answer to 2 decimal places
Answer: Mean = 53.71, Median = 58, Range = 68