Keystones — Capstone
Five GCSE retrieval questions · 6 May 2016 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √567
Answer: 9√7 -
2. Algebra Completing the square
Complete the square: 4x² + 8x + 1
Answer: 4(x + 1)² - 3 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 30cm, b = 20cm, angle = 55°. Give your answer to 2 decimal places
Answer: 245.75cm² -
4. Ratio Combining two ratios
a:b is 1:2 and b:c is 3:5. Find a:b:c in its simplest form.
Answer: 3:6:10 -
5. Statistics Averages and range
Find the mean, median and range of: 97, 56, 54, 68, 16, 91, 78, 95. Give your answer to 2 decimal places
Answer: Mean = 69.38, Median = 73, Range = 81