Keystones — Lintel
Five GCSE retrieval questions · 17 February 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0063
Answer: 6.3 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 3
Answer: (x + 3)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 22cm, angle = 49°. Find opposite
Answer: 25.3cm -
4. Ratio Mixed ratio problems
Simplify: 8:4:10
Answer: 4:2:5 -
5. Statistics Mean
Calculate the mean of: 8, 22, 16, 26, 21, 9, 47, 49
Answer: 24.8