Keystones — Lintel
Five GCSE retrieval questions · 18 January 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
Solve: 6x = 42
Answer: x = 7 -
3. Geometry
Opposite = 19cm, adjacent = 8cm. Calculate the angle
Answer: 67.2° -
4. Ratio
Calculate 38.4% of 502
Answer: 192.77 -
5. Statistics
A bag has 4 red and 7 blue balls. What is the probability of picking a red ball?
Answer: 4⁄11