Keystones — Lintel
Five GCSE retrieval questions · 26 June 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 90,000,000 in standard form
Answer: 9 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² + 5x - 6
Answer: (x + 6)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 12cm, angle = 59°. Find opposite. Give your answer to 2 decimal places
Answer: 19.97cm -
4. Ratio Mixed ratio problems
Simplify the ratio £9 : 40p
Answer: 45:2 -
5. Statistics Mean
The mean of 4 numbers is 33. If 3 of them are 44, 32, 47, what is the missing number?
Answer: 9