Keystones — Capstone
Five GCSE retrieval questions · 27 December 2014 · mathsvault.uk/keystones
-
1. Number Simplifying surds
Simplify: √539
Answer: 7√11 -
2. Algebra Completing the square
Complete the square: 5x² - 40x + 10
Answer: 5(x - 4)² - 70 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 13cm, b = 19cm, angle = 77°. Give your answer to 2 decimal places
Answer: 120.33cm² -
4. Ratio Combining two ratios
a:b is 7:4 and b:c is 9:1. Find a:b:c in its simplest form.
Answer: 63:36:4 -
5. Statistics Averages and range
Find the mean, median and range of: 73, 48, 62, 73, 55, 34, 14, 20, 62
Answer: Mean = 49, Median = 55, Range = 59