Keystones — Lintel
Five GCSE retrieval questions · 10 December 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.093 in standard form
Answer: 9.3 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 6x - 27
Answer: (x + 3)(x - 9) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 25cm, angle = 45°. Find opposite
Answer: 25cm -
4. Ratio Mixed ratio problems
£147.00 is shared between A and B in the ratio 4:3. How much does A receive?
Answer: £84.00 -
5. Statistics Mean
Calculate the mean of: 14, 7, 19, 31, 49, 21
Answer: 23.5