Keystones — Capstone
Five GCSE retrieval questions · 2 July 2015 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: 2√40
Answer: 4√10 -
2. Algebra Completing the square
Complete the square: 4x² - 8x - 2
Answer: 4(x - 1)² - 6 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 30cm, b = 14cm, angle = 61°. Give your answer to 2 decimal places
Answer: 183.67cm² -
4. Ratio Combining two ratios
a:b is 9:7 and b:c is 3:2. Find a:b:c in its simplest form.
Answer: 27:21:14 -
5. Statistics Averages and range
Find the mean, median and range of: 44, 74, 27, 46, 16, 60, 63, 95. Give your answer to 2 decimal places
Answer: Mean = 53.13, Median = 53, Range = 79