Keystones — Lintel
Five GCSE retrieval questions · 18 March 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.000073 in standard form
Answer: 7.3 × 10-5 -
2. Algebra Factorising monic quadratics
Factorise: x² - 3x - 54
Answer: (x + 6)(x - 9) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 25cm, angle = 44°. Find adjacent side. Give your answer to 2 decimal places
Answer: 17.98cm -
4. Ratio Mixed ratio problems
£266.00 is shared between A and B in the ratio 5:2. How much does A receive?
Answer: £190.00 -
5. Statistics Mean
The mean of 4 numbers is 24. If 3 of them are 39, 16, 18, what is the missing number?
Answer: 23