Keystones — Lintel
Five GCSE retrieval questions · 16 October 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.014
Answer: 1.4 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 32
Answer: (x + 8)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 14cm, angle = 43°. Find opposite
Answer: 13.cm -
4. Ratio Mixed ratio problems
In ratio 1:2:2, what fraction is the second part?
Answer: 2⁄5 -
5. Statistics Mean
The mean of 4 numbers is 34. If 3 of them are 17, 35, 20, what is the missing number?
Answer: 64