Keystones — Lintel
Five GCSE retrieval questions · 27 October 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
3900000
Answer: 3.9 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 8
Answer: (x + 4)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 18cm, angle = 52°. Find adjacent side
Answer: 11.cm -
4. Ratio Mixed ratio problems
Express the first part of 3:5 as a fraction in simplest form
Answer: 3⁄8 -
5. Statistics Mean
The mean of 5 numbers is 35. If 4 of them are 35, 42, 20, 20, what is the missing number?
Answer: 58