Keystones — Lintel
Five GCSE retrieval questions · 14 June 2026 · mathsvault.uk/keystones
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1. Number
The temperature is -11°C. It rises by 19°C. What is the new temperature?
Answer: 8°C -
2. Algebra
Factorise fully: 8x² + 20x
Answer: 4x(2x + 5) -
3. Geometry
Find c if a = 20cm and b = 10cm in a right triangle
Answer: 22.4cm -
4. Ratio
Calculate 35.6% of 445
Answer: 158.42 -
5. Statistics
Find the range of: -16, 25, -21, 25, -4
Answer: 46