Keystones — Lintel
Five GCSE retrieval questions · 26 January 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0087 in standard form
Answer: 8.7 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 2
Answer: (x + 2)(x - 1) -
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
£280.00 is shared between A and B in the ratio 3:4. How much does A receive?
Answer: £120.00 -
5. Statistics Mean
Calculate the mean of: 28, 47, 30, 20, 44, 24. Give your answer to 2 decimal places
Answer: 32.17