Keystones — Lintel
Five GCSE retrieval questions · 11 January 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.000067 in standard form
Answer: 6.7 × 10-5 -
2. Algebra Factorising monic quadratics
Factorise: x² + 18x + 77
Answer: (x + 11)(x + 7) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 16cm, angle = 39°. Find opposite. Give your answer to 2 decimal places
Answer: 12.96cm -
4. Ratio Mixed ratio problems
£189.00 is shared between A and B in the ratio 5:4. How much does A receive?
Answer: £105.00 -
5. Statistics Mean
Calculate the mean of: 15, 47, 25, 50, 47, 14
Answer: 33