Keystones — Lintel
Five GCSE retrieval questions · 12 May 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 340,000,000 in standard form
Answer: 3.4 × 108 -
2. Algebra Factorising monic quadratics
Factorise: x² + 5x - 50
Answer: (x + 10)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 31cm, angle = 51°. Find adjacent side. Give your answer to 2 decimal places
Answer: 19.51cm -
4. Ratio Mixed ratio problems
£210.00 is shared between A and B in the ratio 2:1. How much does A receive?
Answer: £140.00 -
5. Statistics Mean
Calculate the mean of: 40, 50, 29, 32, 41, 30
Answer: 37