Keystones — Lintel
Five GCSE retrieval questions · 29 April 2025 · mathsvault.uk/keystones
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1. Number
Find the total of 242, 149, and 95
Answer: 486 -
2. Algebra
Solve: 5x = 45
Answer: x = 9 -
3. Geometry
Find c if a = 19cm and b = 18cm in a right triangle
Answer: 26.2cm -
4. Ratio
Calculate 11.5% of 613
Answer: 70.5 -
5. Statistics
A bag has 8 red and 5 blue balls. What is the probability of picking a red ball?
Answer: 8⁄13