Keystones — Lintel
Five GCSE retrieval questions · 26 February 2025 · mathsvault.uk/keystones
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1. Number
The sum of three consecutive numbers is 129. What are the numbers?
Answer: 42, 43, and 44 -
2. Algebra
Solve: 9x = 27
Answer: x = 3 -
3. Geometry
Find perimeter: adjacent = 20cm, angle = 40°
Answer: 62.9cm -
4. Ratio
Simplify: 10:6:4
Answer: 5:3:2 -
5. Statistics
Find the range of: 8, 21, -3, -15, 4
Answer: 36