Keystones — Capstone
Five GCSE retrieval questions · 31 October 2016 · mathsvault.uk/keystones
-
1. Number Simplifying surds
Simplify: √504
Answer: 6√14 -
2. Algebra Completing the square
Complete the square: 2x² - 24x + 3
Answer: 2(x - 6)² - 69 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 21cm, b = 13cm, angle = 58°. Give your answer to 2 decimal places
Answer: 115.76cm² -
4. Ratio Combining two ratios
a:b is 9:4 and b:c is 7:1. Find a:b:c in its simplest form.
Answer: 63:28:4 -
5. Statistics Averages and range
Find the mean, median and range of: 94, 18, 46, 48, 72, 10, 92. Give your answer to 2 decimal places
Answer: Mean = 54.29, Median = 48, Range = 84