Keystones — Lintel
Five GCSE retrieval questions · 8 May 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 860,000 in standard form
Answer: 8.6 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 7x - 60
Answer: (x + 12)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 11cm, angle = 32°. Find opposite. Give your answer to 2 decimal places
Answer: 6.87cm -
4. Ratio Mixed ratio problems
Divide 210 in the ratio 1:3:3
Answer: 30, 90 and 90 -
5. Statistics Mean
The mean of 6 numbers is 27. If 5 of them are 24, 16, 43, 20, 29, what is the missing number?
Answer: 30