Keystones — Lintel
Five GCSE retrieval questions · 29 June 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0013
Answer: 1.3 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 12
Answer: (x + 4)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 39cm, angle = 64°. Find adjacent side
Answer: 17.cm -
4. Ratio Mixed ratio problems
In ratio 2:4:3, what fraction is the second part?
Answer: 4⁄9 -
5. Statistics Mean
The mean of 6 numbers is 25. If 5 of them are 32, 19, 40, 28, 28, what is the missing number?
Answer: 3