Keystones — Lintel
Five GCSE retrieval questions · 20 September 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.015 in standard form
Answer: 1.5 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 60
Answer: (x + 10)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 10cm, angle = 50°. Find opposite. Give your answer to 2 decimal places
Answer: 11.92cm -
4. Ratio Mixed ratio problems
£245.00 is shared between A and B in the ratio 4:3. How much does A receive?
Answer: £140.00 -
5. Statistics Mean
Calculate the mean of: 27, 20, 6, 40, 36, 29. Give your answer to 2 decimal places
Answer: 26.33