Keystones — Lintel
Five GCSE retrieval questions · 18 April 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 58,000 in standard form
Answer: 5.8 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 5
Answer: (x + 5)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 39cm, angle = 48°. Find adjacent side. Give your answer to 2 decimal places
Answer: 26.cm -
4. Ratio Mixed ratio problems
Simplify the ratio £6 : 10p
Answer: 60:1 -
5. Statistics Mean
Calculate the mean of: 48, 40, 21, 28, 23, 35
Answer: 32.5