Keystones — Capstone
Five GCSE retrieval questions · 17 March 2014 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: 4√48
Answer: 16√3 -
2. Algebra Completing the square
Complete the square: x² + x - 2
Answer: (x + 1⁄2)² - 9⁄4 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 22cm, b = 19cm, angle = 53°. Give your answer to 2 decimal places
Answer: 166.91cm² -
4. Ratio Combining two ratios
a:b is 7:5 and b:c is 8:3. Find a:b:c in its simplest form.
Answer: 56:40:15 -
5. Statistics Averages and range
Find the mean, median and range of: 34, 65, 45, 90, 35, 39, 49
Answer: Mean = 51, Median = 45, Range = 56