Keystones — Capstone
Five GCSE retrieval questions · 9 February 2014 · mathsvault.uk/keystones
-
1. Number Simplifying surds
Simplify: √80
Answer: 4√5 -
2. Algebra Completing the square
Complete the square: 2x² + 24x - 13
Answer: 2(x + 6)² - 85 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 24cm, b = 27cm, angle = 75°. Give your answer to 2 decimal places
Answer: 312.96cm² -
4. Ratio Combining two ratios
a:b is 3:5 and b:c is 2:1. Find a:b:c in its simplest form.
Answer: 6:10:5 -
5. Statistics Averages and range
Find the mean, median and range of: 52, 19, 10, 92, 91, 35, 71, 68
Answer: Mean = 54.75, Median = 60, Range = 82