Keystones — Lintel
Five GCSE retrieval questions · 18 April 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.002
Answer: 2 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 3
Answer: (x + 3)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 27cm, angle = 53°. Find adjacent side
Answer: 16.2cm -
4. Ratio Mixed ratio problems
Express the first part of 2:4 as a fraction in simplest form
Answer: 1⁄3 -
5. Statistics Mean
The mean of 4 numbers is 34. If 3 of them are 38, 36, 43, what is the missing number?
Answer: 19