Keystones — Capstone
Five GCSE retrieval questions · 21 May 2012 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √1000
Answer: 10√10 -
2. Algebra Completing the square
Complete the square: 2x² - 4x - 3
Answer: 2(x - 1)² - 5 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 25cm, b = 23cm, angle = 41°. Give your answer to 2 decimal places
Answer: 188.62cm² -
4. Ratio Combining two ratios
a:b is 7:5 and b:c is 9:1. Find a:b:c in its simplest form.
Answer: 63:45:5 -
5. Statistics Averages and range
Find the mean, median and range of: 35, 47, 33, 37, 87, 49, 50. Give your answer to 2 decimal places
Answer: Mean = 48.29, Median = 47, Range = 54