Keystones — Lintel
Five GCSE retrieval questions · 6 April 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0011 in standard form
Answer: 1.1 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 8x - 9
Answer: (x + 9)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 32cm, angle = 25°. Find adjacent side. Give your answer to 2 decimal places
Answer: 29cm -
4. Ratio Mixed ratio problems
Simplify the ratio 3m : 40cm
Answer: 15:2 -
5. Statistics Mean
Calculate the mean of: 7, 15, 33, 44, 36, 11, 46, 26
Answer: 27.25