Keystones — Lintel
Five GCSE retrieval questions · 14 July 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 2,600,000 in standard form
Answer: 2.6 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x + 3
Answer: (x + 3)(x + 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 29cm, angle = 39°. Find opposite. Give your answer to 2 decimal places
Answer: 23.48cm -
4. Ratio Mixed ratio problems
£273.00 is shared between A and B in the ratio 2:5. How much does A receive?
Answer: £78.00 -
5. Statistics Mean
The mean of 6 numbers is 40. If 5 of them are 38, 44, 28, 40, 46, what is the missing number?
Answer: 44