Keystones — Lintel
Five GCSE retrieval questions · 26 July 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.08
Answer: 8 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 8
Answer: (x + 4)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 29cm, angle = 45°. Find opposite
Answer: 29cm -
4. Ratio Mixed ratio problems
£176.00 is shared between A and B in the ratio 5:3. How much does A receive?
Answer: £110.00 -
5. Statistics Mean
The mean of 5 numbers is 40. If 4 of them are 18, 43, 25, 41, what is the missing number?
Answer: 73