Keystones — Capstone
Five GCSE retrieval questions · 28 September 2022 · mathsvault.uk/keystones
-
1. Number Simplifying surds
Simplify: √162
Answer: 9√2 -
2. Algebra Completing the square
Complete the square: x² + 2x
Answer: (x + 1)² - 1 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 30cm, b = 14cm, angle = 76°
Answer: 203.8cm² -
4. Ratio Combining two ratios
a:b is 3:4 and b:c is 2:3. Find a:b:c.
Answer: 3:4:6 -
5. Statistics Averages and range
Find the mean, median and range of: 14, 75, 84, 50, 96, 89, 38, 99
Answer: Mean = 68.1, Median = 84, Range = 85