Keystones — Capstone
Five GCSE retrieval questions · 9 January 2014 · mathsvault.uk/keystones
-
1. Number Simplifying surds
Simplify: 4√112
Answer: 16√7 -
2. Algebra Completing the square
Complete the square: 4x² - 24x - 15
Answer: 4(x - 3)² - 51 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 29cm, b = 23cm, angle = 53°. Give your answer to 2 decimal places
Answer: 266.34cm² -
4. Ratio Combining two ratios
a:b is 7:4 and b:c is 9:7. Find a:b:c in its simplest form.
Answer: 63:36:28 -
5. Statistics Averages and range
Find the mean, median and range of: 15, 90, 66, 14, 35, 27, 62, 40. Give your answer to 2 decimal places
Answer: Mean = 43.63, Median = 37.5, Range = 76