Keystones — Lintel
Five GCSE retrieval questions · 1 December 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0082
Answer: 8.2 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 5
Answer: (x + 5)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 10cm, angle = 54°. Find opposite
Answer: 13.8cm -
4. Ratio Mixed ratio problems
Simplify: 6:4:12
Answer: 3:2:6 -
5. Statistics Mean
Calculate the mean of: 31, 8, 44, 25, 18, 6, 15
Answer: 21