Keystones — Capstone
Five GCSE retrieval questions · 30 January 2022 · mathsvault.uk/keystones
-
1. Number Simplifying surds
Simplify: √125
Answer: 5√5 -
2. Algebra Completing the square
Complete the square: x² + 2.6x
Answer: (x + 1.3)² - 1.69 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 12cm, b = 19cm, angle = 66°
Answer: 104.cm² -
4. Ratio Combining two ratios
a:b is 3:4 and b:c is 1:2. Find a:b:c.
Answer: 3:4:8 -
5. Statistics Averages and range
Find the mean, median and range of: 22, 41, 34, 32, 28, 21, 96, 55
Answer: Mean = 41.1, Median = 34, Range = 75