Keystones — Lintel
Five GCSE retrieval questions · 13 July 2026 · mathsvault.uk/keystones
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1. Number
Simplify: y3 × y5 × y3
Answer: y11 -
2. Algebra
Factorise: 7x² + 5x
Answer: x(7x + 5) -
3. Geometry
Adjacent = 20cm, hypotenuse = 35cm. Find the angle
Answer: 55.2° -
4. Ratio
Calculate 13.8% of 635
Answer: 87.63 -
5. Statistics
A bag has 4 red and 5 blue balls. What is the probability of picking a red ball?
Answer: 4⁄9