Keystones — Lintel
Five GCSE retrieval questions · 8 April 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.00014 in standard form
Answer: 1.4 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 28
Answer: (x + 7)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 37cm, angle = 32°. Find adjacent side. Give your answer to 2 decimal places
Answer: 31.38cm -
4. Ratio Mixed ratio problems
Divide 161 in the ratio 4:2:1
Answer: 92, 46 and 23 -
5. Statistics Mean
Calculate the mean of: 49, 10, 8, 11, 39, 30, 42
Answer: 27