Keystones — Lintel
Five GCSE retrieval questions · 18 March 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.000045 in standard form
Answer: 4.5 × 10-5 -
2. Algebra Factorising monic quadratics
Factorise: x² + 5x + 6
Answer: (x + 3)(x + 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 23cm, angle = 33°. Find opposite. Give your answer to 2 decimal places
Answer: 14.94cm -
4. Ratio Mixed ratio problems
Divide 70 in the ratio 4:2:1
Answer: 40, 20 and 10 -
5. Statistics Mean
Calculate the mean of: 30, 29, 43, 7, 27, 38, 30. Give your answer to 2 decimal places
Answer: 29.14