Keystones — Capstone
Five GCSE retrieval questions · 11 January 2012 · mathsvault.uk/keystones
-
1. Number Simplifying surds
Simplify: √384
Answer: 8√6 -
2. Algebra Completing the square
Complete the square: 4x² - 24x - 4
Answer: 4(x - 3)² - 40 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 26cm, b = 14cm, angle = 73°. Give your answer to 2 decimal places
Answer: 174.05cm² -
4. Ratio Combining two ratios
a:b is 4:5 and b:c is 2:9. Find a:b:c in its simplest form.
Answer: 8:10:45 -
5. Statistics Averages and range
Find the mean, median and range of: 51, 79, 44, 24, 71, 96, 66. Give your answer to 2 decimal places
Answer: Mean = 61.57, Median = 66, Range = 72