Keystones — Lintel
Five GCSE retrieval questions · 14 July 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.00036 in standard form
Answer: 3.6 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 88
Answer: (x + 11)(x - 8) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 20cm, angle = 43°. Find adjacent side. Give your answer to 2 decimal places
Answer: 14.63cm -
4. Ratio Mixed ratio problems
Simplify: 24:8:20
Answer: 6:2:5 -
5. Statistics Mean
Calculate the mean of: 12, 30, 20, 41, 19, 47, 18, 10. Give your answer to 2 decimal places
Answer: 24.63