Keystones — Lintel
Five GCSE retrieval questions · 19 January 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
5400000
Answer: 5.4 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - 14x + 49
Answer: (x - 7)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 33cm, angle = 40°. Find adjacent side
Answer: 25.3cm -
4. Ratio Mixed ratio problems
Express the first part of 2:3 as a fraction in simplest form
Answer: 2⁄5 -
5. Statistics Mean
Calculate the mean of: 13, 21, 35, 39, 5, 21, 50
Answer: 26.3