Keystones — Capstone
Five GCSE retrieval questions · 20 August 2014 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: 2√12
Answer: 4√3 -
2. Algebra Completing the square
Complete the square: 3x² + 6x - 2
Answer: 3(x + 1)² - 5 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 16cm, b = 13cm, angle = 67°. Give your answer to 2 decimal places
Answer: 95.73cm² -
4. Ratio Combining two ratios
a:b is 3:2 and b:c is 7:8. Find a:b:c in its simplest form.
Answer: 21:14:16 -
5. Statistics Averages and range
Find the mean, median and range of: 18, 42, 99, 34, 45, 21, 32, 64. Give your answer to 2 decimal places
Answer: Mean = 44.38, Median = 38, Range = 81