Keystones — Lintel
Five GCSE retrieval questions · 24 December 2013 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 440,000,000 in standard form
Answer: 4.4 × 108 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 3
Answer: (x + 3)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 38cm, angle = 31°. Find adjacent side. Give your answer to 2 decimal places
Answer: 32.57cm -
4. Ratio Mixed ratio problems
Simplify the ratio £6 : 45p
Answer: 40:3 -
5. Statistics Mean
Calculate the mean of: 26, 31, 49, 6, 47, 21
Answer: 30