Keystones — Lintel
Five GCSE retrieval questions · 25 January 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0081
Answer: 8.1 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 32
Answer: (x + 8)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 21cm, angle = 43°. Find opposite
Answer: 19.6cm -
4. Ratio Mixed ratio problems
£273.00 is shared between A and B in the ratio 5:2. How much does A receive?
Answer: £195.00 -
5. Statistics Mean
Calculate the mean of: 49, 32, 21, 30, 43, 34
Answer: 34.8