Keystones — Lintel
Five GCSE retrieval questions · 27 May 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
5800000
Answer: 5.8 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 5
Answer: (x + 5)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 20cm, angle = 45°. Find adjacent side
Answer: 14.cm -
4. Ratio Mixed ratio problems
Express the first part of 3:6 as a fraction in simplest form
Answer: 1⁄3 -
5. Statistics Mean
The mean of 4 numbers is 40. If 3 of them are 23, 23, 45, what is the missing number?
Answer: 69