Keystones — Capstone
Five GCSE retrieval questions · 7 May 2014 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: 5√44
Answer: 10√11 -
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 = 22cm, b = 24cm, angle = 60°. Give your answer to 2 decimal places
Answer: 228.63cm² -
4. Ratio Combining two ratios
a:b is 2:3 and b:c is 8:1. Find a:b:c in its simplest form.
Answer: 16:24:3 -
5. Statistics Averages and range
Find the mean, median and range of: 33, 55, 12, 19, 12, 89, 24, 75, 39. Give your answer to 2 decimal places
Answer: Mean = 39.78, Median = 33, Range = 77