Keystones — Lintel
Five GCSE retrieval questions · 26 March 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
34000000
Answer: 3.4 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² - 7x + 12
Answer: (x - 4)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 17cm, angle = 30°. Find adjacent side
Answer: 14.7cm -
4. Ratio Mixed ratio problems
Express the first part of 5:4 as a fraction in simplest form
Answer: 5⁄9 -
5. Statistics Mean
Calculate the mean of: 23, 6, 21, 39, 24, 28
Answer: 23.5