Keystones — Lintel
Five GCSE retrieval questions · 22 September 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.083 in standard form
Answer: 8.3 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + 11x + 30
Answer: (x + 6)(x + 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 33cm, angle = 45°. Find adjacent side. Give your answer to 2 decimal places
Answer: 23.33cm -
4. Ratio Mixed ratio problems
Express the first part of 4:14 as a fraction in simplest form
Answer: 2⁄9 -
5. Statistics Mean
Calculate the mean of: 27, 26, 31, 45, 43, 47, 44. Give your answer to 2 decimal places
Answer: 37.57