Keystones — Lintel
Five GCSE retrieval questions · 12 May 2013 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0068 in standard form
Answer: 6.8 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 24
Answer: (x + 6)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 36cm, angle = 41°. Find adjacent side. Give your answer to 2 decimal places
Answer: 27.17cm -
4. Ratio Mixed ratio problems
Simplify the ratio 1 hour : 5 minutes
Answer: 12:1 -
5. Statistics Mean
Calculate the mean of: 6, 33, 16, 21, 30, 5
Answer: 18.5