Keystones — Lintel
Five GCSE retrieval questions · 19 January 2025 · mathsvault.uk/keystones
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1. Number
Calculate: 991 + 658
Answer: 1649 -
2. Algebra
Factorise fully: 28x² + 8x
Answer: 4x(7x + 2) -
3. Geometry
Opposite = 20cm, adjacent = 9cm. Calculate the angle
Answer: 65.8° -
4. Ratio
Find 85% of 345
Answer: 293.25 -
5. Statistics
Calculate the mean of: 12, 42, 39, 49, 49, 25
Answer: 36