Keystones — Lintel
Five GCSE retrieval questions · 29 January 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 17,000 in standard form
Answer: 1.7 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 20
Answer: (x + 5)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 27cm, angle = 31°. Find opposite. Give your answer to 2 decimal places
Answer: 16.22cm -
4. Ratio Mixed ratio problems
£189.00 is shared between A and B in the ratio 5:4. How much does A receive?
Answer: £105.00 -
5. Statistics Mean
Calculate the mean of: 13, 7, 15, 25, 14, 9, 19. Give your answer to 2 decimal places
Answer: 14.57