Keystones — Capstone
Five GCSE retrieval questions · 4 July 2013 · mathsvault.uk/keystones
-
1. Number Simplifying surds
Simplify: √726
Answer: 11√6 -
2. Algebra Completing the square
Complete the square: 4x² + 48x - 6
Answer: 4(x + 6)² - 150 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 20cm, b = 28cm, angle = 62°. Give your answer to 2 decimal places
Answer: 247.23cm² -
4. Ratio Combining two ratios
a:b is 9:2 and b:c is 9:4. Find a:b:c in its simplest form.
Answer: 81:18:8 -
5. Statistics Averages and range
Find the mean, median and range of: 54, 94, 78, 89, 45, 54, 73, 89
Answer: Mean = 72, Median = 75.5, Range = 49