Keystones — Capstone
Five GCSE retrieval questions · 7 October 2013 · mathsvault.uk/keystones
-
1. Number Simplifying surds
Simplify: √360
Answer: 6√10 -
2. Algebra Completing the square
Complete the square: 5x² + 50x + 7
Answer: 5(x + 5)² - 118 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 27cm, b = 25cm, angle = 61°. Give your answer to 2 decimal places
Answer: 295.18cm² -
4. Ratio Combining two ratios
a:b is 3:5 and b:c is 2:9. Find a:b:c in its simplest form.
Answer: 6:10:45 -
5. Statistics Averages and range
Find the mean, median and range of: 74, 32, 56, 33, 69, 97, 16. Give your answer to 2 decimal places
Answer: Mean = 53.86, Median = 56, Range = 81