Keystones — Lintel
Five GCSE retrieval questions · 10 October 2013 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0059 in standard form
Answer: 5.9 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 90
Answer: (x + 10)(x - 9) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 38cm, angle = 51°. Find adjacent side. Give your answer to 2 decimal places
Answer: 23.91cm -
4. Ratio Mixed ratio problems
In ratio 10:6:9, what fraction is the third part?
Answer: 9⁄25 -
5. Statistics Mean
Calculate the mean of: 26, 29, 46, 11, 36, 32, 21, 42. Give your answer to 2 decimal places
Answer: 30.38