Keystones — Lintel
Five GCSE retrieval questions · 7 March 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0025 in standard form
Answer: 2.5 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 5
Answer: (x + 5)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 16cm, angle = 41°. Find opposite. Give your answer to 2 decimal places
Answer: 13.91cm -
4. Ratio Mixed ratio problems
£189.00 is shared between A and B in the ratio 5:2. How much does A receive?
Answer: £135.00 -
5. Statistics Mean
Calculate the mean of: 50, 20, 35, 10, 25, 41, 22, 10. Give your answer to 2 decimal places
Answer: 26.63