Keystones — Lintel
Five GCSE retrieval questions · 29 August 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.000024 in standard form
Answer: 2.4 × 10-5 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 6
Answer: (x + 3)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 17cm, angle = 42°. Find adjacent side. Give your answer to 2 decimal places
Answer: 12.63cm -
4. Ratio Mixed ratio problems
£387.00 is shared between A and B in the ratio 4:5. How much does A receive?
Answer: £172.00 -
5. Statistics Mean
Calculate the mean of: 30, 5, 36, 21, 33, 19, 30, 19. Give your answer to 2 decimal places
Answer: 24.13