Keystones — Lintel
Five GCSE retrieval questions · 14 March 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.000016 in standard form
Answer: 1.6 × 10-5 -
2. Algebra Factorising monic quadratics
Factorise: x² + 5x - 24
Answer: (x + 8)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 24cm, angle = 40°. Find adjacent side. Give your answer to 2 decimal places
Answer: 18.39cm -
4. Ratio Mixed ratio problems
Simplify: 8:8:20
Answer: 2:2:5 -
5. Statistics Mean
Calculate the mean of: 21, 22, 28, 12, 15, 8, 15, 18. Give your answer to 2 decimal places
Answer: 17.38