Keystones — Lintel
Five GCSE retrieval questions · 5 August 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 950,000,000 in standard form
Answer: 9.5 × 108 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 6
Answer: (x + 3)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 22cm, angle = 49°. Find opposite. Give your answer to 2 decimal places
Answer: 25.31cm -
4. Ratio Mixed ratio problems
£320.00 is shared between A and B in the ratio 5:3. How much does A receive?
Answer: £200.00 -
5. Statistics Mean
The mean of 4 numbers is 31. If 3 of them are 24, 47, 36, what is the missing number?
Answer: 17