Keystones — Lintel
Five GCSE retrieval questions · 18 October 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 65,000,000 in standard form
Answer: 6.5 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² + 7x - 8
Answer: (x + 8)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 27cm, angle = 43°. Find opposite. Give your answer to 2 decimal places
Answer: 25.18cm -
4. Ratio Mixed ratio problems
£301.00 is shared between A and B in the ratio 4:3. How much does A receive?
Answer: £172.00 -
5. Statistics Mean
Calculate the mean of: 34, 23, 44, 7, 26, 41, 21
Answer: 28