Keystones — Lintel
Five GCSE retrieval questions · 10 January 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.00062
Answer: 6.2 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 2
Answer: (x + 2)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 26cm, angle = 52°. Find opposite
Answer: 33.3cm -
4. Ratio Mixed ratio problems
In ratio 3:4:2, what fraction is the second part?
Answer: 4⁄9 -
5. Statistics Mean
The mean of 4 numbers is 21. If 3 of them are 18, 44, 20, what is the missing number?
Answer: 2