Keystones — Lintel
Five GCSE retrieval questions · 25 July 2013 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.00083 in standard form
Answer: 8.3 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 7x + 12
Answer: (x - 3)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 29cm, angle = 46°. Find opposite. Give your answer to 2 decimal places
Answer: 30.03cm -
4. Ratio Mixed ratio problems
Simplify the ratio 1 hour : 30 minutes
Answer: 2:1 -
5. Statistics Mean
Calculate the mean of: 37, 28, 23, 49, 27, 44, 47, 9
Answer: 33