Keystones — Lintel
Five GCSE retrieval questions · 25 August 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.00021
Answer: 2.1 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + 5x - 6
Answer: (x + 6)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 19cm, angle = 33°. Find opposite
Answer: 12.3cm -
4. Ratio Mixed ratio problems
Divide 280 in the ratio 2:1:2
Answer: 112, 56 and 112 -
5. Statistics Mean
Calculate the mean of: 7, 24, 20, 37, 36, 27
Answer: 25.2