Keystones — Lintel
Five GCSE retrieval questions · 27 June 2026 · mathsvault.uk/keystones
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1. Number
Calculate: 644 + 430
Answer: 644 + 430 = 1074 -
2. Algebra
Solve: 7x - 8 = 5x + 12
Answer: x = 10 -
3. Geometry
Calculate perimeter: two sides are 15cm and 10cm at right angles
Answer: 43cm -
4. Ratio
Find 37% of 483
Answer: 178.71 -
5. Statistics
Calculate the mean of: 28, 49, 23, 34, 20, 39, 47, 30
Answer: 33.8