Keystones — Capstone
Five GCSE retrieval questions · 3 October 2022 · mathsvault.uk/keystones
-
1. Number Simplifying surds
Simplify: √288
Answer: 12√2 -
2. Algebra Completing the square
Complete the square: x² + 3.4x
Answer: (x + 1.7)² - 2.89 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 16cm, b = 20cm, angle = 77°
Answer: 155.9cm² -
4. Ratio Combining two ratios
a:b is 3:4 and b:c is 2:5. Find a:b:c.
Answer: 3:4:10 -
5. Statistics Averages and range
Find the mean, median and range of: 38, 30, 70, 68, 60, 33, 95, 23, 69
Answer: Mean = 54, Median = 60, Range = 72