Keystones — Lintel
Five GCSE retrieval questions · 14 November 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0049
Answer: 4.9 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 6x - 16
Answer: (x + 8)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 28cm, angle = 47°. Find opposite
Answer: 30cm -
4. Ratio Mixed ratio problems
Simplify: 8:16:20
Answer: 2:4:5 -
5. Statistics Mean
Calculate the mean of: 16, 37, 6, 25, 35, 16, 18, 37
Answer: 23.8