Keystones — Lintel
Five GCSE retrieval questions · 17 January 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.081
Answer: 8.1 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 4
Answer: (x + 4)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 24cm, angle = 38°. Find opposite
Answer: 18.8cm -
4. Ratio Mixed ratio problems
Simplify: 16:16:24
Answer: 2:2:3 -
5. Statistics Mean
Calculate the mean of: 29, 30, 19, 10, 13, 35, 9
Answer: 20.7