Keystones — Lintel
Five GCSE retrieval questions · 12 March 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0057 in standard form
Answer: 5.7 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 2x - 8
Answer: (x + 2)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 26cm, angle = 57°. Find opposite. Give your answer to 2 decimal places
Answer: 40.04cm -
4. Ratio Mixed ratio problems
Simplify the ratio 2 hours : 20 minutes
Answer: 6:1 -
5. Statistics Mean
Calculate the mean of: 12, 11, 21, 6, 37, 13. Give your answer to 2 decimal places
Answer: 16.67