Keystones — Capstone
Five GCSE retrieval questions · 7 December 2017 · mathsvault.uk/keystones
-
1. Number Simplifying surds
Simplify: √832
Answer: 8√13 -
2. Algebra Completing the square
Complete the square: 5x² + 50x + 13
Answer: 5(x + 5)² - 112 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 19cm, b = 18cm, angle = 75°. Give your answer to 2 decimal places
Answer: 165.17cm² -
4. Ratio Combining two ratios
a:b is 8:7 and b:c is 5:8. Find a:b:c in its simplest form.
Answer: 40:35:56 -
5. Statistics Averages and range
Find the mean, median and range of: 52, 66, 21, 78, 73, 80, 85
Answer: Mean = 65, Median = 73, Range = 64