Keystones — Lintel
Five GCSE retrieval questions · 18 February 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.00029
Answer: 2.9 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 5
Answer: (x + 5)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 24cm, angle = 58°. Find opposite
Answer: 38.4cm -
4. Ratio Mixed ratio problems
Divide 252 in the ratio 1:4:4
Answer: 28, 112 and 112 -
5. Statistics Mean
Calculate the mean of: 11, 5, 46, 18, 37, 15, 41
Answer: 24.7