Keystones — Lintel
Five GCSE retrieval questions · 16 October 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.00093 in standard form
Answer: 9.3 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 3x - 70
Answer: (x + 7)(x - 10) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 11cm, angle = 44°. Find opposite. Give your answer to 2 decimal places
Answer: 10.62cm -
4. Ratio Mixed ratio problems
Divide 196 in the ratio 3:3:1
Answer: 84, 84 and 28 -
5. Statistics Mean
Calculate the mean of: 7, 49, 21, 47, 35, 37, 27, 38. Give your answer to 2 decimal places
Answer: 32.63