Keystones — Lintel
Five GCSE retrieval questions · 7 October 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 940,000 in standard form
Answer: 9.4 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 30
Answer: (x + 6)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 33cm, angle = 45°. Find adjacent side. Give your answer to 2 decimal places
Answer: 23.33cm -
4. Ratio Mixed ratio problems
£252.00 is shared between A and B in the ratio 4:3. How much does A receive?
Answer: £144.00 -
5. Statistics Mean
The mean of 4 numbers is 31. If 3 of them are 18, 37, 49, what is the missing number?
Answer: 20