Keystones — Lintel
Five GCSE retrieval questions · 25 July 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.000019 in standard form
Answer: 1.9 × 10-5 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 28
Answer: (x + 7)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 26cm, angle = 46°. Find opposite. Give your answer to 2 decimal places
Answer: 26.92cm -
4. Ratio Mixed ratio problems
£238.00 is shared between A and B in the ratio 4:3. How much does A receive?
Answer: £136.00 -
5. Statistics Mean
Calculate the mean of: 16, 28, 49, 45, 26, 36, 31
Answer: 33