Keystones — Lintel
Five GCSE retrieval questions · 16 April 2013 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 450,000 in standard form
Answer: 4.5 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 4x - 60
Answer: (x + 6)(x - 10) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 28cm, angle = 49°. Find opposite. Give your answer to 2 decimal places
Answer: 32.21cm -
4. Ratio Mixed ratio problems
£450.00 is shared between A and B in the ratio 4:5. How much does A receive?
Answer: £200.00 -
5. Statistics Mean
The mean of 5 numbers is 33. If 4 of them are 18, 46, 25, 32, what is the missing number?
Answer: 44