Keystones — Lintel
Five GCSE retrieval questions · 6 June 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0047 in standard form
Answer: 4.7 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 17x + 66
Answer: (x + 11)(x + 6) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 16cm, angle = 31°. Find opposite. Give your answer to 2 decimal places
Answer: 9.61cm -
4. Ratio Mixed ratio problems
£246.00 is shared between A and B in the ratio 1:2. How much does A receive?
Answer: £82.00 -
5. Statistics Mean
Calculate the mean of: 38, 16, 23, 26, 45, 44, 28, 30
Answer: 31.25