Keystones — Lintel
Five GCSE retrieval questions · 30 July 2026 · mathsvault.uk/keystones
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1. Number
The sum of three consecutive numbers is 105. What are the numbers?
Answer: 34, 35, and 36 -
2. Algebra
Solve: 8x - 6 = 6x + -2
Answer: x = 2 -
3. Geometry
Calculate perimeter: two sides are 13cm and 8cm at right angles
Answer: 36.3cm -
4. Ratio
Calculate 27.4% of 770
Answer: 210.98 -
5. Statistics
Find the range of: -20, 30, 4, -30, -3
Answer: 60