Keystones — Lintel
Five GCSE retrieval questions · 23 March 2026 · mathsvault.uk/keystones
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1. Number
Calculate: 535 + 515
Answer: 535 + 515 = 1050 -
2. Algebra
Collect like terms: 7x + 6y + 3x + 4y
Answer: 10x + 10y -
3. Geometry
Calculate the hypotenuse when a = 11cm and b = 4cm
Answer: 11.7cm -
4. Ratio
Simplify the ratio 6m:600cm
Answer: 1:100 -
5. Statistics
Calculate the mean of: 22, 39, 17, 13, 15, 28
Answer: 22.3