Keystones — Lintel
Five GCSE retrieval questions · 26 January 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
710000
Answer: 7.1 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 7x - 8
Answer: (x + 8)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 19cm, angle = 53°. Find adjacent side
Answer: 11.4cm -
4. Ratio Mixed ratio problems
In ratio 1:4:1, what fraction is the second part?
Answer: 4⁄6 -
5. Statistics Mean
The mean of 4 numbers is 31. If 3 of them are 44, 23, 39, what is the missing number?
Answer: 18