Keystones — Capstone
Five GCSE retrieval questions · 8 November 2024 · mathsvault.uk/keystones
-
1. Number Simplifying surds
Simplify: √147
Answer: 7√3 -
2. Algebra Completing the square
Complete the square: x² + 5x
Answer: (x + 2.5)² - 6.25 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 17cm, b = 15cm, angle = 77°
Answer: 124.2cm² -
4. Ratio Combining two ratios
a:b is 3:2 and b:c is 1:2. Find a:b:c.
Answer: 9:6:12 -
5. Statistics Averages and range
Find the mean, median and range of: 79, 22, 48, 86, 60, 43, 34, 83
Answer: Mean = 56.9, Median = 60, Range = 64