Keystones — Capstone
Five GCSE retrieval questions · 15 March 2014 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: 4√44
Answer: 8√11 -
2. Algebra Completing the square
Complete the square: 3x² + 24x + 14
Answer: 3(x + 4)² - 34 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 16cm, b = 13cm, angle = 56°. Give your answer to 2 decimal places
Answer: 86.22cm² -
4. Ratio Combining two ratios
a:b is 4:5 and b:c is 4:9. Find a:b:c in its simplest form.
Answer: 16:20:45 -
5. Statistics Averages and range
Find the mean, median and range of: 33, 31, 19, 13, 70, 79, 54. Give your answer to 2 decimal places
Answer: Mean = 42.71, Median = 33, Range = 66