Keystones — Capstone
Five GCSE retrieval questions · 3 June 2015 · mathsvault.uk/keystones
-
1. Number Simplifying surds
Simplify: 3√32
Answer: 12√2 -
2. Algebra Completing the square
Complete the square: 4x² + 32x + 15
Answer: 4(x + 4)² - 49 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 22cm, b = 24cm, angle = 60°. Give your answer to 2 decimal places
Answer: 228.63cm² -
4. Ratio Combining two ratios
a:b is 2:7 and b:c is 8:5. Find a:b:c in its simplest form.
Answer: 16:56:35 -
5. Statistics Averages and range
Find the mean, median and range of: 76, 81, 12, 90, 24, 84, 46
Answer: Mean = 59, Median = 76, Range = 78