Keystones — Lintel
Five GCSE retrieval questions · 12 February 2026 · mathsvault.uk/keystones
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1. Number
Calculate: 995 + 858
Answer: 1853 -
2. Algebra
Solve: x⁄4 = 7.75
Answer: x = 31 -
3. Geometry
A right triangle has hypotenuse 13cm and one side 5cm. Find its area
Answer: 30cm² -
4. Ratio
Calculate 35.7% of 557
Answer: 198.85 -
5. Statistics
A bag has 5 red and 7 blue balls. What is the probability of picking a red ball?
Answer: 5⁄12