Keystones — Lintel
Five GCSE retrieval questions · 23 October 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.052 in standard form
Answer: 5.2 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 56
Answer: (x + 8)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 33cm, angle = 25°. Find adjacent side. Give your answer to 2 decimal places
Answer: 29.91cm -
4. Ratio Mixed ratio problems
In ratio 8:5:1, what fraction is the second part?
Answer: 5⁄14 -
5. Statistics Mean
Calculate the mean of: 24, 26, 13, 42, 43, 14, 48
Answer: 30