Keystones — Lintel
Five GCSE retrieval questions · 17 December 2025 · mathsvault.uk/keystones
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1. Number
The sum of three consecutive numbers is 138. What are the numbers?
Answer: 45, 46, and 47 -
2. Algebra
Expand: 4(5x + 8)
Answer: 20x + 32 -
3. Geometry
Adjacent = 21cm, hypotenuse = 41cm. Find the angle
Answer: 59.2° -
4. Ratio
Calculate 10.5% of 524
Answer: 55.02 -
5. Statistics
Find the range of: 0, 35, -10, 18, 0
Answer: 45