Keystones — Lintel
Five GCSE retrieval questions · 5 August 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 7,400,000 in standard form
Answer: 7.4 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 35
Answer: (x + 7)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 21cm, angle = 46°. Find adjacent side. Give your answer to 2 decimal places
Answer: 14.59cm -
4. Ratio Mixed ratio problems
Simplify: 8:10:4
Answer: 4:5:2 -
5. Statistics Mean
Calculate the mean of: 46, 22, 47, 39, 50, 40, 44. Give your answer to 2 decimal places
Answer: 41.14