Keystones — Lintel
Five GCSE retrieval questions · 23 May 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.00024 in standard form
Answer: 2.4 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 2x - 24
Answer: (x + 4)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 25cm, angle = 37°. Find opposite. Give your answer to 2 decimal places
Answer: 18.84cm -
4. Ratio Mixed ratio problems
Simplify: 8:24:24
Answer: 1:3:3 -
5. Statistics Mean
Calculate the mean of: 40, 28, 40, 43, 14, 18
Answer: 30.5