Keystones — Lintel
Five GCSE retrieval questions · 12 December 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0066 in standard form
Answer: 6.6 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 6x - 16
Answer: (x + 8)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 15cm, angle = 64°. Find adjacent side. Give your answer to 2 decimal places
Answer: 6.58cm -
4. Ratio Mixed ratio problems
Simplify: 12:18:12
Answer: 2:3:2 -
5. Statistics Mean
Calculate the mean of: 8, 23, 39, 23, 33, 40. Give your answer to 2 decimal places
Answer: 27.67