Keystones — Lintel
Five GCSE retrieval questions · 30 June 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 470,000 in standard form
Answer: 4.7 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 24
Answer: (x + 6)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 31cm, angle = 49°. Find adjacent side. Give your answer to 2 decimal places
Answer: 20.34cm -
4. Ratio Mixed ratio problems
£322.00 is shared between A and B in the ratio 3:4. How much does A receive?
Answer: £138.00 -
5. Statistics Mean
The mean of 4 numbers is 31. If 3 of them are 48, 27, 29, what is the missing number?
Answer: 20