Keystones — Lintel
Five GCSE retrieval questions · 16 April 2025 · mathsvault.uk/keystones
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1. Number
Calculate: 301 + 353
Answer: 301 + 353 = 654 -
2. Algebra
Factorise fully: 25x² + 35x
Answer: 5x(5x + 7) -
3. Geometry
A circle has area 78.5cm². Find its radius (dp)
Answer: 5cm -
4. Ratio
Simplify: 9:12:15
Answer: 3:4:5 -
5. Statistics
Find the range of: 7, -12, 37, 9, 19
Answer: 49