Keystones — Lintel
Five GCSE retrieval questions · 17 December 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.029 in standard form
Answer: 2.9 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - x - 90
Answer: (x + 9)(x - 10) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 20cm, angle = 42°. Find adjacent side. Give your answer to 2 decimal places
Answer: 14.86cm -
4. Ratio Mixed ratio problems
£140.00 is shared between A and B in the ratio 4:3. How much does A receive?
Answer: £80.00 -
5. Statistics Mean
Calculate the mean of: 34, 38, 22, 19, 30, 19
Answer: 27