Keystones — Lintel
Five GCSE retrieval questions · 22 August 2010 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0098 in standard form
Answer: 9.8 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 10x + 24
Answer: (x + 6)(x + 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 38cm, angle = 40°. Find adjacent side. Give your answer to 2 decimal places
Answer: 29.11cm -
4. Ratio Mixed ratio problems
£182.00 is shared between A and B in the ratio 5:2. How much does A receive?
Answer: £130.00 -
5. Statistics Mean
Calculate the mean of: 46, 42, 11, 46, 45, 34, 37. Give your answer to 2 decimal places
Answer: 37.29