Keystones — Lintel
Five GCSE retrieval questions · 29 April 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
680000
Answer: 6.8 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 24
Answer: (x + 6)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 23cm, angle = 42°. Find opposite
Answer: 20.7cm -
4. Ratio Mixed ratio problems
In ratio 4:2:1, what fraction is the second part?
Answer: 2⁄7 -
5. Statistics Mean
The mean of 6 numbers is 38. If 5 of them are 33, 50, 44, 39, 46, what is the missing number?
Answer: 16