Keystones — Lintel
Five GCSE retrieval questions · 3 October 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0015
Answer: 1.5 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 6x - 16
Answer: (x + 8)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 18cm, angle = 37°. Find adjacent side
Answer: 14.4cm -
4. Ratio Mixed ratio problems
Express the first part of 6:2 as a fraction in simplest form
Answer: 3⁄4 -
5. Statistics Mean
The mean of 6 numbers is 34. If 5 of them are 17, 41, 46, 26, 49, what is the missing number?
Answer: 25