Keystones — Lintel
Five GCSE retrieval questions · 15 June 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 3,400,000 in standard form
Answer: 3.4 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 70
Answer: (x + 10)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 11cm, angle = 41°. Find opposite. Give your answer to 2 decimal places
Answer: 9.56cm -
4. Ratio Mixed ratio problems
£432.00 is shared between A and B in the ratio 5:4. How much does A receive?
Answer: £240.00 -
5. Statistics Mean
The mean of 4 numbers is 33. If 3 of them are 19, 42, 24, what is the missing number?
Answer: 47