Keystones — Lintel
Five GCSE retrieval questions · 3 June 2013 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0075 in standard form
Answer: 7.5 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 90
Answer: (x + 10)(x - 9) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 38cm, angle = 53°. Find adjacent side. Give your answer to 2 decimal places
Answer: 22.87cm -
4. Ratio Mixed ratio problems
£369.00 is shared between A and B in the ratio 5:4. How much does A receive?
Answer: £205.00 -
5. Statistics Mean
The mean of 4 numbers is 27. If 3 of them are 22, 44, 18, what is the missing number?
Answer: 24