Keystones — Lintel
Five GCSE retrieval questions · 29 October 2013 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 70,000 in standard form
Answer: 7 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - x - 12
Answer: (x + 3)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 12cm, angle = 35°. Find opposite. Give your answer to 2 decimal places
Answer: 8.4cm -
4. Ratio Mixed ratio problems
£154.00 is shared between A and B in the ratio 2:5. How much does A receive?
Answer: £44.00 -
5. Statistics Mean
The mean of 4 numbers is 26. If 3 of them are 44, 31, 24, what is the missing number?
Answer: 5