Keystones — Lintel
Five GCSE retrieval questions · 22 March 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 6,900,000 in standard form
Answer: 6.9 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x + 3
Answer: (x + 3)(x + 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 40cm, angle = 28°. Find adjacent side. Give your answer to 2 decimal places
Answer: 35.32cm -
4. Ratio Mixed ratio problems
In ratio 11:4:9, what fraction is the first part?
Answer: 11⁄24 -
5. Statistics Mean
Calculate the mean of: 32, 42, 20, 21, 25, 13, 50, 28. Give your answer to 2 decimal places
Answer: 28.88