Keystones — Capstone
Five GCSE retrieval questions · 10 January 2014 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √600
Answer: 10√6 -
2. Algebra Completing the square
Complete the square: 3x² - 12x + 1
Answer: 3(x - 2)² - 11 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 26cm, b = 13cm, angle = 58°. Give your answer to 2 decimal places
Answer: 143.32cm² -
4. Ratio Combining two ratios
a:b is 4:5 and b:c is 3:1. Find a:b:c in its simplest form.
Answer: 12:15:5 -
5. Statistics Averages and range
Find the mean, median and range of: 48, 51, 10, 61, 35, 50, 66. Give your answer to 2 decimal places
Answer: Mean = 45.86, Median = 50, Range = 56