Keystones — Capstone
Five GCSE retrieval questions · 10 May 2014 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √336
Answer: 4√21 -
2. Algebra Completing the square
Complete the square: 2x² - 16x - 3
Answer: 2(x - 4)² - 35 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 17cm, b = 13cm, angle = 50°. Give your answer to 2 decimal places
Answer: 84.65cm² -
4. Ratio Combining two ratios
a:b is 7:9 and b:c is 5:3. Find a:b:c in its simplest form.
Answer: 35:45:27 -
5. Statistics Averages and range
Find the mean, median and range of: 57, 75, 97, 60, 28, 14, 93, 28, 42. Give your answer to 2 decimal places
Answer: Mean = 54.89, Median = 57, Range = 83