Keystones — Lintel
Five GCSE retrieval questions · 11 April 2025 · mathsvault.uk/keystones
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1. Number
Calculate: 393 + 221
Answer: 393 + 221 = 614 -
2. Algebra
Factorise fully: 6x² + 8x
Answer: 2x(3x + 4) -
3. Geometry
Find the distance between (-4, -1) and (4, 11)
Answer: 14.42 -
4. Ratio
Simplify the ratio 4m:400cm
Answer: 1:100 -
5. Statistics
A bag has 5 red and 8 blue balls. What is the probability of picking a red ball?
Answer: 5⁄13