Keystones — Capstone
Five GCSE retrieval questions · 5 June 2022 · mathsvault.uk/keystones
-
1. Number Simplifying surds
Simplify: √98
Answer: 7√2 -
2. Algebra Completing the square
Complete the square: x² + 4.6x
Answer: (x + 2.3)² - 5.29 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 30cm, b = 12cm, angle = 55°
Answer: 147.4cm² -
4. Ratio Combining two ratios
a:b is 3:2 and b:c is 4:3. Find a:b:c.
Answer: 6:4:3 -
5. Statistics Averages and range
Find the mean, median and range of: 56, 59, 36, 38, 91, 80, 99, 40
Answer: Mean = 62.4, Median = 59, Range = 63