Keystones — Lintel
Five GCSE retrieval questions · 3 March 2025 · mathsvault.uk/keystones
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1. Number
Calculate: 335 + 920
Answer: 335 + 920 = 1255 -
2. Algebra
Factorise: 4x² + 9x
Answer: x(4x + 9) -
3. Geometry
A circle has area 452.4cm². Find its radius (dp)
Answer: 12cm -
4. Ratio
Simplify: 8:10:10
Answer: 4:5:5 -
5. Statistics
A bag has 4 red and 5 blue balls. What is the probability of picking a red ball?
Answer: 4⁄9