Keystones — Lintel
Five GCSE retrieval questions · 8 June 2026 · mathsvault.uk/keystones
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1. Number
Calculate: 991 + 575
Answer: 1566 -
2. Algebra
Solve: 8x = 56
Answer: x = 7 -
3. Geometry
Calculate the perimeter of a right triangle with sides 8cm and 10cm
Answer: 30.8cm -
4. Ratio
Simplify: 12:16:12
Answer: 3:4:3 -
5. Statistics
Find the range of: -10, 27, 41, -25, 15
Answer: 66