Keystones — Lintel
Five GCSE retrieval questions · 20 October 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.00065 in standard form
Answer: 6.5 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 132
Answer: (x + 12)(x - 11) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 21cm, angle = 54°. Find opposite. Give your answer to 2 decimal places
Answer: 28.9cm -
4. Ratio Mixed ratio problems
Simplify the ratio kg : 400g
Answer: 5:2 -
5. Statistics Mean
Calculate the mean of: 43, 39, 44, 14, 37, 11. Give your answer to 2 decimal places
Answer: 31.33