Keystones — Lintel
Five GCSE retrieval questions · 29 July 2025 · mathsvault.uk/keystones
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1. Number
Calculate: 466 + 623
Answer: 466 + 623 = 1089 -
2. Algebra
Solve: 4x = 32
Answer: x = 8 -
3. Geometry
Calculate the perimeter of a right triangle with sides 12cm and 10cm
Answer: 37.6cm -
4. Ratio
Simplify: 12:15:18
Answer: 4:5:6 -
5. Statistics
Calculate the mean of: 40, 50, 41, 36, 25, 31
Answer: 37.2