Keystones — Lintel
Five GCSE retrieval questions · 25 July 2025 · 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: 2x = 10
Answer: x = 5 -
3. Geometry
Find perimeter: adjacent = 10cm, angle = 55°
Answer: 41.7cm -
4. Ratio
Find 38% of 77
Answer: 29.26 -
5. Statistics
A bag has 5 red and 6 blue balls. What is the probability of picking a red ball?
Answer: 5⁄11