Keystones — Lintel
Five GCSE retrieval questions · 28 December 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 200,000 in standard form
Answer: 2 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x + 3
Answer: (x + 3)(x + 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 15cm, angle = 41°. Find opposite. Give your answer to 2 decimal places
Answer: 13.04cm -
4. Ratio Mixed ratio problems
£210.00 is shared between A and B in the ratio 1:2. How much does A receive?
Answer: £70.00 -
5. Statistics Mean
Calculate the mean of: 22, 48, 17, 50, 32, 22. Give your answer to 2 decimal places
Answer: 31.83