Keystones — Lintel
Five GCSE retrieval questions · 9 February 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 67,000 in standard form
Answer: 6.7 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² + 14x + 48
Answer: (x + 8)(x + 6) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 27cm, angle = 62°. Find adjacent side. Give your answer to 2 decimal places
Answer: 12.68cm -
4. Ratio Mixed ratio problems
Simplify: 4:4:10
Answer: 2:2:5 -
5. Statistics Mean
The mean of 4 numbers is 23. If 3 of them are 28, 23, 26, what is the missing number?
Answer: 15