Keystones — Lintel
Five GCSE retrieval questions · 16 April 2017 · 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 + 20x + 99
Answer: (x + 11)(x + 9) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 33cm, angle = 47°. Find adjacent side. Give your answer to 2 decimal places
Answer: 22.51cm -
4. Ratio Mixed ratio problems
Simplify: 6:18:9
Answer: 2:6:3 -
5. Statistics Mean
Calculate the mean of: 46, 33, 37, 18, 33, 16, 15, 16
Answer: 26.75