Keystones — Lintel
Five GCSE retrieval questions · 9 December 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
2700000
Answer: 2.7 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 56
Answer: (x + 8)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 19cm, angle = 40°. Find opposite
Answer: 15.9cm -
4. Ratio Mixed ratio problems
In ratio 2:1:4, what fraction is the second part?
Answer: 1⁄7 -
5. Statistics Mean
The mean of 4 numbers is 32. If 3 of them are 24, 43, 31, what is the missing number?
Answer: 30