Keystones — Lintel
Five GCSE retrieval questions · 23 August 2025 · mathsvault.uk/keystones
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1. Number
The sum of three consecutive numbers is 150. What are the numbers?
Answer: 49, 50, and 51 -
2. Algebra
Simplify: 6x - 4x + 6y - 4y
Answer: 2x + 2y -
3. Geometry
Opposite = 13cm, adjacent = 12cm. Calculate the angle
Answer: 47.3° -
4. Ratio
Calculate 11.6% of 668
Answer: 77.49 -
5. Statistics
Calculate the mean of: 37, 39, 50, 33, 36, 8, 30
Answer: 33.3