Keystones — Lintel
Five GCSE retrieval questions · 3 October 2010 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 530,000 in standard form
Answer: 5.3 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 10
Answer: (x + 5)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 38cm, angle = 60°. Find adjacent side
Answer: 19cm -
4. Ratio Mixed ratio problems
£176.00 is shared between A and B in the ratio 3:5. How much does A receive?
Answer: £66.00 -
5. Statistics Mean
The mean of 4 numbers is 32. If 3 of them are 30, 20, 21, what is the missing number?
Answer: 57