Keystones — Lintel
Five GCSE retrieval questions · 4 December 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.067
Answer: 6.7 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 9x + 20
Answer: (x - 4)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 17cm, angle = 60°. Find adjacent side
Answer: 8.5cm -
4. Ratio Mixed ratio problems
Express the first part of 5:6 as a fraction in simplest form
Answer: 5⁄11 -
5. Statistics Mean
Calculate the mean of: 19, 38, 28, 10, 31, 15, 11, 8
Answer: 20