Keystones — Lintel
Five GCSE retrieval questions · 23 March 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.029
Answer: 2.9 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 12
Answer: (x + 6)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 28cm, angle = 50°. Find adjacent side
Answer: 18cm -
4. Ratio Mixed ratio problems
Simplify the ratio 2m:200cm
Answer: 1:100 -
5. Statistics Mean
Calculate the mean of: 24, 14, 38, 36, 9, 18, 20, 32
Answer: 23.9