Keystones — Lintel
Five GCSE retrieval questions · 28 February 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.000069 in standard form
Answer: 6.9 × 10-5 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 12
Answer: (x + 4)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 38cm, angle = 30°. Find adjacent side. Give your answer to 2 decimal places
Answer: 32.91cm -
4. Ratio Mixed ratio problems
£360.00 is shared between A and B in the ratio 4:5. How much does A receive?
Answer: £160.00 -
5. Statistics Mean
Calculate the mean of: 12, 30, 46, 48, 50, 35, 10
Answer: 33