Keystones — Capstone
Five GCSE retrieval questions · 20 March 2016 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: 5√28
Answer: 10√7 -
2. Algebra Completing the square
Complete the square: 3x² + 18x - 13
Answer: 3(x + 3)² - 40 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 15cm, b = 15cm, angle = 47°. Give your answer to 2 decimal places
Answer: 82.28cm² -
4. Ratio Combining two ratios
a:b is 5:7 and b:c is 8:1. Find a:b:c in its simplest form.
Answer: 40:56:7 -
5. Statistics Averages and range
Find the mean, median and range of: 53, 55, 46, 93, 74, 94, 90, 24. Give your answer to 2 decimal places
Answer: Mean = 66.13, Median = 64.5, Range = 70