Keystones — Lintel
Five GCSE retrieval questions · 10 April 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0015
Answer: 1.5 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 5x - 24
Answer: (x + 8)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 13cm, angle = 52°. Find opposite
Answer: 16.6cm -
4. Ratio Mixed ratio problems
Divide 152 in the ratio 1:1:2
Answer: 38, 38 and 76 -
5. Statistics Mean
Calculate the mean of: 37, 49, 23, 20, 44, 36, 38
Answer: 35.3