Keystones — Lintel
Five GCSE retrieval questions · 19 May 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.00036 in standard form
Answer: 3.6 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 63
Answer: (x + 9)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 35cm, angle = 29°. Find adjacent side. Give your answer to 2 decimal places
Answer: 30.61cm -
4. Ratio Mixed ratio problems
£312.00 is shared between A and B in the ratio 3:5. How much does A receive?
Answer: £117.00 -
5. Statistics Mean
Calculate the mean of: 15, 33, 30, 29, 39, 21, 39. Give your answer to 2 decimal places
Answer: 29.43