Keystones — Lintel
Five GCSE retrieval questions · 3 December 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 66,000,000 in standard form
Answer: 6.6 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² + 8x + 12
Answer: (x + 6)(x + 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 18cm, angle = 55°. Find adjacent side. Give your answer to 2 decimal places
Answer: 10.32cm -
4. Ratio Mixed ratio problems
Simplify: 15:15:18
Answer: 5:5:6 -
5. Statistics Mean
Calculate the mean of: 8, 42, 35, 17, 49, 5
Answer: 26