Keystones — Lintel
Five GCSE retrieval questions · 9 November 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.00058 in standard form
Answer: 5.8 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 48
Answer: (x + 8)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 18cm, angle = 51°. Find adjacent side. Give your answer to 2 decimal places
Answer: 11.33cm -
4. Ratio Mixed ratio problems
£231.00 is shared between A and B in the ratio 4:3. How much does A receive?
Answer: £132.00 -
5. Statistics Mean
The mean of 5 numbers is 29. If 4 of them are 23, 33, 21, 21, what is the missing number?
Answer: 47