Keystones — Capstone
Five GCSE retrieval questions · 8 October 2016 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: 5√48
Answer: 20√3 -
2. Algebra Completing the square
Complete the square: 4x² - 8x - 14
Answer: 4(x - 1)² - 18 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 26cm, b = 13cm, angle = 69°. Give your answer to 2 decimal places
Answer: 157.78cm² -
4. Ratio Combining two ratios
a:b is 3:5 and b:c is 3:5. Find a:b:c in its simplest form.
Answer: 9:15:25 -
5. Statistics Averages and range
Find the mean, median and range of: 51, 79, 98, 85, 81, 75, 45, 65. Give your answer to 2 decimal places
Answer: Mean = 72.38, Median = 77, Range = 53