Keystones — Capstone
Five GCSE retrieval questions · 26 July 2014 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: 3√160
Answer: 12√10 -
2. Algebra Completing the square
Complete the square: 2x² + 4x - 13
Answer: 2(x + 1)² - 15 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 26cm, b = 28cm, angle = 45°. Give your answer to 2 decimal places
Answer: 257.39cm² -
4. Ratio Combining two ratios
a:b is 5:2 and b:c is 5:4. Find a:b:c in its simplest form.
Answer: 25:10:8 -
5. Statistics Averages and range
Find the mean, median and range of: 63, 29, 58, 60, 53, 78, 99, 19. Give your answer to 2 decimal places
Answer: Mean = 57.38, Median = 59, Range = 80