Keystones — Capstone
Five GCSE retrieval questions · 18 April 2014 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √1000
Answer: 10√10 -
2. Algebra Completing the square
Complete the square: 2x² - 4x + 10
Answer: 2(x - 1)² + 8 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 15cm, b = 23cm, angle = 73°. Give your answer to 2 decimal places
Answer: 164.96cm² -
4. Ratio Combining two ratios
a:b is 7:4 and b:c is 7:3. Find a:b:c in its simplest form.
Answer: 49:28:12 -
5. Statistics Averages and range
Find the mean, median and range of: 56, 71, 30, 36, 80, 24, 83. Give your answer to 2 decimal places
Answer: Mean = 54.29, Median = 56, Range = 59