Keystones — Capstone
Five GCSE retrieval questions · 3 July 2020 · mathsvault.uk/keystones
-
1. Number Simplifying surds
Simplify: √192
Answer: 8√3 -
2. Algebra Completing the square
Complete the square: x² + 5.2x
Answer: (x + 2.6)² - 6.76 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 30cm, b = 24cm, angle = 66°
Answer: 328.9cm² -
4. Ratio Combining two ratios
a:b is 4:3 and b:c is 3:4. Find a:b:c.
Answer: 4:3:4 -
5. Statistics Averages and range
Find the mean, median and range of: 79, 22, 43, 52, 92, 34, 54, 87, 14
Answer: Mean = 53, Median = 52, Range = 78