Keystones — Lintel
Five GCSE retrieval questions · 23 September 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0051 in standard form
Answer: 5.1 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 12
Answer: (x + 6)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 39cm, angle = 54°. Find adjacent side. Give your answer to 2 decimal places
Answer: 22.92cm -
4. Ratio Mixed ratio problems
Simplify the ratio 2kg : 900g
Answer: 20:9 -
5. Statistics Mean
Calculate the mean of: 15, 47, 10, 15, 22, 11
Answer: 20