Keystones — Lintel
Five GCSE retrieval questions · 23 March 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0089 in standard form
Answer: 8.9 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 35
Answer: (x + 7)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 28cm, angle = 51°. Find adjacent side. Give your answer to 2 decimal places
Answer: 17.62cm -
4. Ratio Mixed ratio problems
Express the second part of 3:14 as a fraction in simplest form
Answer: 14⁄17 -
5. Statistics Mean
Calculate the mean of: 12, 33, 30, 8, 21, 10
Answer: 19