Keystones — Capstone
Five GCSE retrieval questions · 5 April 2016 · mathsvault.uk/keystones
-
1. Number Simplifying surds
Simplify: 5√50
Answer: 25√2 -
2. Algebra Completing the square
Complete the square: 3x² - 30x + 11
Answer: 3(x - 5)² - 64 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 27cm, b = 28cm, angle = 59°. Give your answer to 2 decimal places
Answer: 324.01cm² -
4. Ratio Combining two ratios
a:b is 6:7 and b:c is 2:3. Find a:b:c in its simplest form.
Answer: 12:14:21 -
5. Statistics Averages and range
Find the mean, median and range of: 27, 37, 100, 25, 93, 94, 62, 70, 25. Give your answer to 2 decimal places
Answer: Mean = 59.22, Median = 62, Range = 75