Keystones — Lintel
Five GCSE retrieval questions · 17 March 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.00003 in standard form
Answer: 3 × 10-5 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 30
Answer: (x + 6)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 16cm, angle = 35°. Find opposite. Give your answer to 2 decimal places
Answer: 11.2cm -
4. Ratio Mixed ratio problems
Simplify: 6:4:10
Answer: 3:2:5 -
5. Statistics Mean
Calculate the mean of: 16, 5, 17, 26, 48, 42. Give your answer to 2 decimal places
Answer: 25.67