Keystones — Lintel
Five GCSE retrieval questions · 14 November 2013 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 590,000 in standard form
Answer: 5.9 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 16x + 60
Answer: (x + 10)(x + 6) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 19cm, angle = 53°. Find opposite. Give your answer to 2 decimal places
Answer: 25.21cm -
4. Ratio Mixed ratio problems
Simplify the ratio 3 litres : 400 ml
Answer: 15:2 -
5. Statistics Mean
The mean of 4 numbers is 32. If 3 of them are 36, 36, 35, what is the missing number?
Answer: 21