Keystones — Lintel
Five GCSE retrieval questions · 24 March 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.094 in standard form
Answer: 9.4 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 6x + 5
Answer: (x - 1)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 35cm, angle = 51°. Find adjacent side. Give your answer to 2 decimal places
Answer: 22.03cm -
4. Ratio Mixed ratio problems
£168.00 is shared between A and B in the ratio 3:4. How much does A receive?
Answer: £72.00 -
5. Statistics Mean
The mean of 6 numbers is 32. If 5 of them are 22, 22, 41, 39, 42, what is the missing number?
Answer: 26