Keystones — Lintel
Five GCSE retrieval questions · 4 July 2010 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 670,000 in standard form
Answer: 6.7 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 2
Answer: (x + 2)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 16cm, angle = 32°. Find opposite. Give your answer to 2 decimal places
Answer: 10cm -
4. Ratio Mixed ratio problems
Divide 200 in the ratio 4:3:1
Answer: 100, 75 and 25 -
5. Statistics Mean
The mean of 5 numbers is 38. If 4 of them are 18, 37, 44, 32, what is the missing number?
Answer: 59