Keystones — Lintel
Five GCSE retrieval questions · 29 March 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 78,000,000 in standard form
Answer: 7.8 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² + 18x + 80
Answer: (x + 10)(x + 8) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 22cm, angle = 30°. Find adjacent side. Give your answer to 2 decimal places
Answer: 19.05cm -
4. Ratio Mixed ratio problems
£190.00 is shared between A and B in the ratio 2:3. How much does A receive?
Answer: £76.00 -
5. Statistics Mean
Calculate the mean of: 21, 17, 21, 9, 20, 48, 33. Give your answer to 2 decimal places
Answer: 24.14