Keystones — Capstone
Five GCSE retrieval questions · 3 April 2016 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √700
Answer: 10√7 -
2. Algebra Completing the square
Complete the square: 4x² + 32x + 4
Answer: 4(x + 4)² - 60 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 21cm, b = 16cm, angle = 49°. Give your answer to 2 decimal places
Answer: 126.79cm² -
4. Ratio Combining two ratios
a:b is 8:3 and b:c is 5:2. Find a:b:c in its simplest form.
Answer: 40:15:6 -
5. Statistics Averages and range
Find the mean, median and range of: 42, 60, 60, 32, 17, 94, 16, 70, 22. Give your answer to 2 decimal places
Answer: Mean = 45.89, Median = 42, Range = 78