Keystones — Capstone
Five GCSE retrieval questions · 14 April 2011 · mathsvault.uk/keystones
-
1. Number Simplifying surds
Simplify: √726
Answer: 11√6 -
2. Algebra Completing the square
Complete the square: x² - 7x + 6
Answer: (x - 7⁄2)² - 25⁄4 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 19cm, b = 29cm, angle = 47°. Give your answer to 2 decimal places
Answer: 201.49cm² -
4. Ratio Combining two ratios
a:b is 5:2 and b:c is 7:5. Find a:b:c in its simplest form.
Answer: 35:14:10 -
5. Statistics Averages and range
Find the mean, median and range of: 57, 46, 31, 63, 74, 91, 55, 81
Answer: Mean = 62.25, Median = 60, Range = 60