Keystones — Capstone
Five GCSE retrieval questions · 29 August 2011 · mathsvault.uk/keystones
-
1. Number Simplifying surds
Simplify: √684
Answer: 6√19 -
2. Algebra Completing the square
Complete the square: 3x² - 24x - 8
Answer: 3(x - 4)² - 56 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 15cm, b = 27cm, angle = 64°. Give your answer to 2 decimal places
Answer: 182.01cm² -
4. Ratio Combining two ratios
a:b is 2:9 and b:c is 8:1. Find a:b:c in its simplest form.
Answer: 16:72:9 -
5. Statistics Averages and range
Find the mean, median and range of: 95, 83, 34, 90, 51, 50, 50, 42. Give your answer to 2 decimal places
Answer: Mean = 61.88, Median = 50.5, Range = 61