Keystones — Lintel
Five GCSE retrieval questions · 23 July 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 75,000 in standard form
Answer: 7.5 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 8
Answer: (x + 4)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 40cm, angle = 53°. Find adjacent side. Give your answer to 2 decimal places
Answer: 24.07cm -
4. Ratio Mixed ratio problems
Divide 72 in the ratio 1:2:3
Answer: 12, 24 and 36 -
5. Statistics Mean
Calculate the mean of: 38, 50, 10, 42, 16, 24, 29. Give your answer to 2 decimal places
Answer: 29.86