Keystones — Capstone
Five GCSE retrieval questions · 24 July 2015 · mathsvault.uk/keystones
-
1. Number Simplifying surds
Simplify: √891
Answer: 9√11 -
2. Algebra Completing the square
Complete the square: 5x² - 40x - 13
Answer: 5(x - 4)² - 93 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 14cm, b = 13cm, angle = 44°. Give your answer to 2 decimal places
Answer: 63.21cm² -
4. Ratio Combining two ratios
a:b is 8:5 and b:c is 3:1. Find a:b:c in its simplest form.
Answer: 24:15:5 -
5. Statistics Averages and range
Find the mean, median and range of: 23, 24, 26, 63, 92, 55, 46, 80, 62. Give your answer to 2 decimal places
Answer: Mean = 52.33, Median = 55, Range = 69