Keystones — Lintel
Five GCSE retrieval questions · 3 June 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
33000000
Answer: 3.3 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 6
Answer: (x + 3)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 40cm, angle = 51°. Find adjacent side
Answer: 25.2cm -
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 40. If 5 of them are 15, 49, 45, 31, 37, what is the missing number?
Answer: 63