Keystones — Capstone
Five GCSE retrieval questions · 20 November 2011 · mathsvault.uk/keystones
-
1. Number Simplifying surds
Simplify: 4√54
Answer: 12√6 -
2. Algebra Completing the square
Complete the square: 4x² - 32x - 8
Answer: 4(x - 4)² - 72 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 30cm, b = 29cm, angle = 47°. Give your answer to 2 decimal places
Answer: 318.14cm² -
4. Ratio Combining two ratios
a:b is 7:8 and b:c is 3:1. Find a:b:c in its simplest form.
Answer: 21:24:8 -
5. Statistics Averages and range
Find the mean, median and range of: 92, 47, 91, 51, 11, 64, 99
Answer: Mean = 65, Median = 64, Range = 88