Keystones — Capstone
Five GCSE retrieval questions · 9 June 2011 · mathsvault.uk/keystones
-
1. Number Simplifying surds
Simplify: √162
Answer: 9√2 -
2. Algebra Completing the square
Complete the square: 4x² - 48x - 12
Answer: 4(x - 6)² - 156 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 25cm, b = 19cm, angle = 40°. Give your answer to 2 decimal places
Answer: 152.66cm² -
4. Ratio Combining two ratios
a:b is 5:4 and b:c is 3:7. Find a:b:c in its simplest form.
Answer: 15:12:28 -
5. Statistics Averages and range
Find the mean, median and range of: 38, 40, 66, 97, 32, 99, 24. Give your answer to 2 decimal places
Answer: Mean = 56.57, Median = 40, Range = 75