Keystones — Lintel
Five GCSE retrieval questions · 3 September 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.00028
Answer: 2.8 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 5
Answer: (x + 5)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 30cm, angle = 51°. Find opposite
Answer: 37cm -
4. Ratio Mixed ratio problems
£154.00 is shared between A and B in the ratio 2:5. How much does A receive?
Answer: £44.00 -
5. Statistics Mean
Calculate the mean of: 31, 26, 47, 29, 32, 13
Answer: 29.7