Keystones — Lintel
Five GCSE retrieval questions · 10 May 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0032 in standard form
Answer: 3.2 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 6x - 7
Answer: (x + 7)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 26cm, angle = 49°. Find adjacent side. Give your answer to 2 decimal places
Answer: 17.06cm -
4. Ratio Mixed ratio problems
£120.00 is shared between A and B in the ratio 3:2. How much does A receive?
Answer: £72.00 -
5. Statistics Mean
The mean of 5 numbers is 40. If 4 of them are 34, 43, 31, 36, what is the missing number?
Answer: 56