Keystones — Lintel
Five GCSE retrieval questions · 13 October 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0047 in standard form
Answer: 4.7 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 88
Answer: (x + 11)(x - 8) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 27cm, angle = 55°. Find opposite. Give your answer to 2 decimal places
Answer: 38.56cm -
4. Ratio Mixed ratio problems
£350.00 is shared between A and B in the ratio 2:5. How much does A receive?
Answer: £100.00 -
5. Statistics Mean
Calculate the mean of: 23, 48, 42, 32, 28, 44, 8. Give your answer to 2 decimal places
Answer: 32.14