Keystones — Lintel
Five GCSE retrieval questions · 30 September 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 110,000,000 in standard form
Answer: 1.1 × 108 -
2. Algebra Factorising monic quadratics
Factorise: x² + 6x + 8
Answer: (x + 4)(x + 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 18cm, angle = 51°. Find opposite. Give your answer to 2 decimal places
Answer: 22.23cm -
4. Ratio Mixed ratio problems
Simplify: 10:6:8
Answer: 5:3:4 -
5. Statistics Mean
Calculate the mean of: 5, 23, 42, 35, 12, 5. Give your answer to 2 decimal places
Answer: 20.33