Keystones — Lintel
Five GCSE retrieval questions · 7 June 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 540,000 in standard form
Answer: 5.4 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 11x - 12
Answer: (x + 12)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 16cm, angle = 57°. Find adjacent side. Give your answer to 2 decimal places
Answer: 8.71cm -
4. Ratio Mixed ratio problems
Simplify the ratio 3 hours : 10 minutes
Answer: 18:1 -
5. Statistics Mean
The mean of 6 numbers is 29. If 5 of them are 38, 18, 41, 26, 40, what is the missing number?
Answer: 11