Keystones — Lintel
Five GCSE retrieval questions · 2 May 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 950,000,000 in standard form
Answer: 9.5 × 108 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 4
Answer: (x + 4)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 30cm, angle = 35°. Find opposite. Give your answer to 2 decimal places
Answer: 21.01cm -
4. Ratio Mixed ratio problems
In ratio 9:3:10, what fraction is the third part?
Answer: 5⁄11 -
5. Statistics Mean
The mean of 4 numbers is 32. If 3 of them are 37, 37, 15, what is the missing number?
Answer: 39