Keystones — Lintel
Five GCSE retrieval questions · 7 May 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
48000000
Answer: 4.8 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 3
Answer: (x + 3)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 40cm, angle = 58°. Find adjacent side
Answer: 21.2cm -
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 5 numbers is 28. If 4 of them are 34, 35, 50, 40, what is the missing number?
Answer: -19