Keystones — Lintel
Five GCSE retrieval questions · 19 October 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0086
Answer: 8.6 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 7x - 8
Answer: (x + 8)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 19cm, angle = 54°. Find opposite
Answer: 26.2cm -
4. Ratio Mixed ratio problems
£230.00 is shared between A and B in the ratio 2:3. How much does A receive?
Answer: £92.00 -
5. Statistics Mean
The mean of 4 numbers is 32. If 3 of them are 23, 27, 48, what is the missing number?
Answer: 30