Keystones — Lintel
Five GCSE retrieval questions · 24 May 2026 · mathsvault.uk/keystones
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1. Number
The sum of three consecutive numbers is 126. What are the numbers?
Answer: 41, 42, and 43 -
2. Algebra
Solve: 2x = 18
Answer: x = 9 -
3. Geometry
Opposite = 9cm, adjacent = 8cm. Calculate the angle
Answer: 48.4° -
4. Ratio
Simplify the ratio 4m:400cm
Answer: 1:100 -
5. Statistics
A bag has 8 red and 5 blue balls. What is the probability of picking a red ball?
Answer: 8⁄13