Keystones — Lintel
Five GCSE retrieval questions · 29 March 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.00086 in standard form
Answer: 8.6 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 4x - 32
Answer: (x + 4)(x - 8) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 39cm, angle = 38°. Find adjacent side. Give your answer to 2 decimal places
Answer: 30.73cm -
4. Ratio Mixed ratio problems
£235.00 is shared between A and B in the ratio 2:3. How much does A receive?
Answer: £94.00 -
5. Statistics Mean
Calculate the mean of: 22, 26, 18, 33, 16, 22, 24
Answer: 23