Keystones — Lintel
Five GCSE retrieval questions · 3 March 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 54,000 in standard form
Answer: 5.4 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² + 12x + 11
Answer: (x + 11)(x + 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 16cm, angle = 50°. Find adjacent side. Give your answer to 2 decimal places
Answer: 10.28cm -
4. Ratio Mixed ratio problems
Simplify: 6:15:18
Answer: 2:5:6 -
5. Statistics Mean
The mean of 5 numbers is 36. If 4 of them are 36, 28, 50, 46, what is the missing number?
Answer: 20