Keystones — Lintel
Five GCSE retrieval questions · 25 November 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 3,600,000 in standard form
Answer: 3.6 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 15
Answer: (x + 5)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 25cm, angle = 47°. Find opposite. Give your answer to 2 decimal places
Answer: 26.81cm -
4. Ratio Mixed ratio problems
£126.00 is shared between A and B in the ratio 2:1. How much does A receive?
Answer: £84.00 -
5. Statistics Mean
Calculate the mean of: 24, 6, 37, 10, 41, 25, 28, 47
Answer: 27.25