Keystones — Lintel
Five GCSE retrieval questions · 5 November 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
72000
Answer: 7.2 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 6
Answer: (x + 3)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 15cm, angle = 46°. Find adjacent side
Answer: 10.4cm -
4. Ratio Mixed ratio problems
In ratio 3:2:3, what fraction is the second part?
Answer: 2⁄8 -
5. Statistics Mean
The mean of 4 numbers is 26. If 3 of them are 20, 18, 18, what is the missing number?
Answer: 48