Keystones — Lintel
Five GCSE retrieval questions · 9 December 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.00002 in standard form
Answer: 2 × 10-5 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 5
Answer: (x + 5)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 15cm, angle = 41°. Find adjacent side. Give your answer to 2 decimal places
Answer: 11.32cm -
4. Ratio Mixed ratio problems
£208.00 is shared between A and B in the ratio 5:3. How much does A receive?
Answer: £130.00 -
5. Statistics Mean
Calculate the mean of: 38, 16, 13, 27, 37, 42, 28. Give your answer to 2 decimal places
Answer: 28.71