Keystones — Lintel
Five GCSE retrieval questions · 4 March 2025 · mathsvault.uk/keystones
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1. Number
Calculate: 829 + 407
Answer: 829 + 407 = 1236 -
2. Algebra
Factorise: 3x² + 8x
Answer: x(3x + 8) -
3. Geometry
A right triangle has hypotenuse 10cm and one side 6cm. Find its area
Answer: 24cm² -
4. Ratio
Calculate 20.5% of 248
Answer: 50.84 -
5. Statistics
Find the range of: -13, 32, -13, -19, 41
Answer: 60