Keystones — Lintel
Five GCSE retrieval questions · 31 January 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.00012 in standard form
Answer: 1.2 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 4
Answer: (x + 4)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 34cm, angle = 28°. Find adjacent side. Give your answer to 2 decimal places
Answer: 30.02cm -
4. Ratio Mixed ratio problems
Simplify: 12:9:18
Answer: 4:3:6 -
5. Statistics Mean
Calculate the mean of: 43, 40, 41, 39, 32, 25, 13. Give your answer to 2 decimal places
Answer: 33.29