Keystones — Lintel
Five GCSE retrieval questions · 29 July 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0045
Answer: 4.5 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 2
Answer: (x + 2)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 25cm, angle = 44°. Find opposite
Answer: 24.cm -
4. Ratio Mixed ratio problems
£168.00 is shared between A and B in the ratio 5:3. How much does A receive?
Answer: £105.00 -
5. Statistics Mean
The mean of 5 numbers is 27. If 4 of them are 25, 35, 18, 46, what is the missing number?
Answer: 11