Keystones — Lintel
Five GCSE retrieval questions · 5 December 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 590,000,000 in standard form
Answer: 5.9 × 108 -
2. Algebra Factorising monic quadratics
Factorise: x² - 4x - 21
Answer: (x + 3)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 16cm, angle = 41°. Find opposite. Give your answer to 2 decimal places
Answer: 13.91cm -
4. Ratio Mixed ratio problems
£279.00 is shared between A and B in the ratio 5:4. How much does A receive?
Answer: £155.00 -
5. Statistics Mean
Calculate the mean of: 18, 12, 24, 18, 36, 20, 45. Give your answer to 2 decimal places
Answer: 24.71