Keystones — Lintel
Five GCSE retrieval questions · 22 February 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0059
Answer: 5.9 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 30
Answer: (x + 6)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 39cm, angle = 40°. Find adjacent side
Answer: 29.9cm -
4. Ratio Mixed ratio problems
In ratio 4:1:3, what fraction is the second part?
Answer: 1⁄8 -
5. Statistics Mean
The mean of 4 numbers is 27. If 3 of them are 29, 36, 36, what is the missing number?
Answer: 7