Keystones — Lintel
Five GCSE retrieval questions · 8 March 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0095
Answer: 9.5 × 10^-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 10
Answer: (x + 5)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 25cm, angle = 51°. Find opposite
Answer: 30.9cm -
4. Ratio Mixed ratio problems
Divide 70 in the ratio 2:2:3
Answer: 20, 20 and 30 -
5. Statistics Mean
Calculate the mean of: 44, 31, 46, 44, 49, 5
Answer: 36.5