Keystones — Capstone
Five GCSE retrieval questions · 21 January 2012 · mathsvault.uk/keystones
-
1. Number Simplifying surds
Simplify: √96
Answer: 4√6 -
2. Algebra Completing the square
Complete the square: 3x² - 12x + 6
Answer: 3(x - 2)² - 6 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 18cm, b = 21cm, angle = 40°. Give your answer to 2 decimal places
Answer: 121.49cm² -
4. Ratio Combining two ratios
a:b is 3:5 and b:c is 7:9. Find a:b:c in its simplest form.
Answer: 21:35:45 -
5. Statistics Averages and range
Find the mean, median and range of: 75, 62, 64, 49, 74, 97, 71, 52, 46. Give your answer to 2 decimal places
Answer: Mean = 65.56, Median = 64, Range = 51