Keystones — Lintel
Five GCSE retrieval questions · 1 November 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 46,000,000 in standard form
Answer: 4.6 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 30
Answer: (x + 6)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 38cm, angle = 51°. Find adjacent side. Give your answer to 2 decimal places
Answer: 23.91cm -
4. Ratio Mixed ratio problems
Simplify: 20:16:16
Answer: 5:4:4 -
5. Statistics Mean
Calculate the mean of: 36, 17, 7, 37, 21, 15. Give your answer to 2 decimal places
Answer: 22.17