Keystones — Lintel
Five GCSE retrieval questions · 15 May 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.00048 in standard form
Answer: 4.8 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 12
Answer: (x + 6)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 26cm, angle = 38°. Find opposite. Give your answer to 2 decimal places
Answer: 20.31cm -
4. Ratio Mixed ratio problems
Simplify the ratio 3 litres : 50 ml
Answer: 60:1 -
5. Statistics Mean
Calculate the mean of: 6, 21, 12, 40, 35, 5, 31, 8
Answer: 19.75