Keystones — Capstone
Five GCSE retrieval questions · 13 March 2013 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √792
Answer: 6√22 -
2. Algebra Completing the square
Complete the square: x² - x - 10
Answer: (x - 1⁄2)² - 41⁄4 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 16cm, b = 22cm, angle = 42°. Give your answer to 2 decimal places
Answer: 117.77cm² -
4. Ratio Combining two ratios
a:b is 7:8 and b:c is 5:6. Find a:b:c in its simplest form.
Answer: 35:40:48 -
5. Statistics Averages and range
Find the mean, median and range of: 85, 65, 59, 37, 52, 87, 27. Give your answer to 2 decimal places
Answer: Mean = 58.86, Median = 59, Range = 60