Keystones — Lintel
Five GCSE retrieval questions · 13 September 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 40,000 in standard form
Answer: 4 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 6
Answer: (x + 3)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 28cm, angle = 58°. Find adjacent side. Give your answer to 2 decimal places
Answer: 14.84cm -
4. Ratio Mixed ratio problems
Simplify: 9:15:18
Answer: 3:5:6 -
5. Statistics Mean
The mean of 4 numbers is 33. If 3 of them are 40, 43, 16, what is the missing number?
Answer: 33