Keystones — Capstone
Five GCSE retrieval questions · 2 April 2013 · mathsvault.uk/keystones
-
1. Number Simplifying surds
Simplify: √96
Answer: 4√6 -
2. Algebra Completing the square
Complete the square: 5x² + 10x - 10
Answer: 5(x + 1)² - 15 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 13cm, b = 14cm, angle = 62°. Give your answer to 2 decimal places
Answer: 80.35cm² -
4. Ratio Combining two ratios
a:b is 3:8 and b:c is 5:8. Find a:b:c in its simplest form.
Answer: 15:40:64 -
5. Statistics Averages and range
Find the mean, median and range of: 61, 25, 46, 35, 25, 70, 88, 77. Give your answer to 2 decimal places
Answer: Mean = 53.38, Median = 53.5, Range = 63