Keystones — Lintel
Five GCSE retrieval questions · 2 June 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 720,000 in standard form
Answer: 7.2 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 48
Answer: (x + 8)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 35cm, angle = 63°. Find adjacent side. Give your answer to 2 decimal places
Answer: 15.89cm -
4. Ratio Mixed ratio problems
Divide 189 in the ratio 1:3:3
Answer: 27, 81 and 81 -
5. Statistics Mean
The mean of 4 numbers is 37. If 3 of them are 48, 22, 43, what is the missing number?
Answer: 35