Keystones — Lintel
Five GCSE retrieval questions · 5 March 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.062 in standard form
Answer: 6.2 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + 18x + 81
Answer: (x + 9)(x + 9) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 36cm, angle = 31°. Find adjacent side. Give your answer to 2 decimal places
Answer: 30.86cm -
4. Ratio Mixed ratio problems
Simplify: 9:6:15
Answer: 3:2:5 -
5. Statistics Mean
Calculate the mean of: 19, 15, 11, 8, 48, 44, 26, 8. Give your answer to 2 decimal places
Answer: 22.38