Keystones — Lintel
Five GCSE retrieval questions · 17 November 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
350000
Answer: 3.5 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 3
Answer: (x + 3)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 32cm, angle = 63°. Find adjacent side
Answer: 14.5cm -
4. Ratio Mixed ratio problems
Express the first part of 6:3 as a fraction in simplest form
Answer: 2⁄3 -
5. Statistics Mean
The mean of 5 numbers is 32. If 4 of them are 45, 18, 44, 19, what is the missing number?
Answer: 34