Keystones — Lintel
Five GCSE retrieval questions · 28 May 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.00074 in standard form
Answer: 7.4 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 22x + 121
Answer: (x - 11)(x - 11) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 10cm, angle = 53°. Find opposite. Give your answer to 2 decimal places
Answer: 13.27cm -
4. Ratio Mixed ratio problems
Divide 297 in the ratio 3:4:4
Answer: 81, 108 and 108 -
5. Statistics Mean
Calculate the mean of: 49, 34, 46, 50, 33, 13
Answer: 37.5