Keystones — Lintel
Five GCSE retrieval questions · 16 January 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 390,000 in standard form
Answer: 3.9 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 6x + 5
Answer: (x + 5)(x + 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 40cm, angle = 31°. Find adjacent side. Give your answer to 2 decimal places
Answer: 34.29cm -
4. Ratio Mixed ratio problems
£230.00 is shared between A and B in the ratio 3:2. How much does A receive?
Answer: £138.00 -
5. Statistics Mean
Calculate the mean of: 41, 46, 15, 17, 50, 47, 22, 30
Answer: 33.5