Keystones — Lintel
Five GCSE retrieval questions · 23 July 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 1,300,000 in standard form
Answer: 1.3 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + 9x + 20
Answer: (x + 5)(x + 4) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 22cm, angle = 54°. Find opposite. Give your answer to 2 decimal places
Answer: 30.28cm -
4. Ratio Mixed ratio problems
In ratio 6:1:5, what fraction is the third part?
Answer: 5⁄12 -
5. Statistics Mean
The mean of 4 numbers is 24. If 3 of them are 41, 26, 19, what is the missing number?
Answer: 10