Keystones — Lintel
Five GCSE retrieval questions · 9 February 2026 · mathsvault.uk/keystones
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1. Number
The sum of three consecutive numbers is 114. What are the numbers?
Answer: 37, 38, and 39 -
2. Algebra
What is the next term? 2, 6, 18, 54, ...
Answer: 162 -
3. Geometry
Opposite = 20cm, adjacent = 9cm. Calculate the angle
Answer: 65.8° -
4. Ratio
Simplify the ratio 5m:500cm
Answer: 1:100 -
5. Statistics
Find the range of: -23, 12, -16, 22, 3
Answer: 45