Keystones — Lintel
Five GCSE retrieval questions · 15 September 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
85000000
Answer: 8.5 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 3
Answer: (x + 3)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 30cm, angle = 26°. Find adjacent side
Answer: 27cm -
4. Ratio Mixed ratio problems
In ratio 4:2:2, what fraction is the second part?
Answer: 2⁄8 -
5. Statistics Mean
Calculate the mean of: 24, 10, 18, 42, 40, 48
Answer: 30.3