Keystones — Capstone
Five GCSE retrieval questions · 11 October 2014 · mathsvault.uk/keystones
-
1. Number Simplifying surds
Simplify: √810
Answer: 9√10 -
2. Algebra Completing the square
Complete the square: 2x² - 20x - 2
Answer: 2(x - 5)² - 52 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 18cm, b = 27cm, angle = 62°. Give your answer to 2 decimal places
Answer: 214.56cm² -
4. Ratio Combining two ratios
a:b is 1:9 and b:c is 6:7. Find a:b:c in its simplest form.
Answer: 2:18:21 -
5. Statistics Averages and range
Find the mean, median and range of: 56, 19, 93, 99, 54, 53, 46
Answer: Mean = 60, Median = 54, Range = 80