Keystones — Lintel
Five GCSE retrieval questions · 15 March 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
80000
Answer: 8 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 4
Answer: (x + 4)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 11cm, angle = 32°. Find opposite
Answer: 6.9cm -
4. Ratio Mixed ratio problems
In ratio 3:2:2, what fraction is the second part?
Answer: 2⁄7 -
5. Statistics Mean
The mean of 5 numbers is 24. If 4 of them are 45, 29, 23, 42, what is the missing number?
Answer: -19