Keystones — Lintel
Five GCSE retrieval questions · 25 June 2010 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 4,600,000 in standard form
Answer: 4.6 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + 8x - 20
Answer: (x + 10)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 37cm, angle = 60°. Find adjacent side
Answer: 18.5cm -
4. Ratio Mixed ratio problems
£245.00 is shared between A and B in the ratio 3:4. How much does A receive?
Answer: £105.00 -
5. Statistics Mean
The mean of 5 numbers is 32. If 4 of them are 35, 36, 40, 20, what is the missing number?
Answer: 29