Keystones — Capstone
Five GCSE retrieval questions · 12 January 2018 · mathsvault.uk/keystones
-
1. Number Simplifying surds
Simplify: √208
Answer: 4√13 -
2. Algebra Completing the square
Complete the square: 3x² - 36x + 10
Answer: 3(x - 6)² - 98 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 24cm, b = 18cm, angle = 65°. Give your answer to 2 decimal places
Answer: 195.76cm² -
4. Ratio Combining two ratios
a:b is 7:9 and b:c is 8:3. Find a:b:c in its simplest form.
Answer: 56:72:27 -
5. Statistics Averages and range
Find the mean, median and range of: 50, 10, 95, 100, 41, 43, 96. Give your answer to 2 decimal places
Answer: Mean = 62.14, Median = 50, Range = 90