Keystones — Lintel
Five GCSE retrieval questions · 11 October 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.00084 in standard form
Answer: 8.4 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + 12x + 36
Answer: (x + 6)(x + 6) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 22cm, angle = 50°. Find opposite. Give your answer to 2 decimal places
Answer: 26.22cm -
4. Ratio Mixed ratio problems
£176.00 is shared between A and B in the ratio 3:5. How much does A receive?
Answer: £66.00 -
5. Statistics Mean
The mean of 6 numbers is 32. If 5 of them are 48, 26, 32, 47, 19, what is the missing number?
Answer: 20