Keystones — Capstone
Five GCSE retrieval questions · 25 May 2014 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: 3√18
Answer: 9√2 -
2. Algebra Completing the square
Complete the square: 4x² + 8x - 8
Answer: 4(x + 1)² - 12 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 17cm, b = 20cm, angle = 64°. Give your answer to 2 decimal places
Answer: 152.79cm² -
4. Ratio Combining two ratios
a:b is 2:3 and b:c is 5:4. Find a:b:c in its simplest form.
Answer: 10:15:12 -
5. Statistics Averages and range
Find the mean, median and range of: 56, 74, 16, 96, 60, 94, 49. Give your answer to 2 decimal places
Answer: Mean = 63.57, Median = 60, Range = 80