Keystones — Capstone
Five GCSE retrieval questions · 14 October 2014 · mathsvault.uk/keystones
-
1. Number Simplifying surds
Simplify: √75
Answer: 5√3 -
2. Algebra Completing the square
Complete the square: 4x² + 48x - 6
Answer: 4(x + 6)² - 150 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 16cm, b = 17cm, angle = 67°. Give your answer to 2 decimal places
Answer: 125.19cm² -
4. Ratio Combining two ratios
a:b is 5:6 and b:c is 4:9. Find a:b:c in its simplest form.
Answer: 10:12:27 -
5. Statistics Averages and range
Find the mean, median and range of: 95, 89, 68, 87, 29, 63, 91, 84
Answer: Mean = 75.75, Median = 85.5, Range = 66