Keystones — Lintel
Five GCSE retrieval questions · 11 June 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 3,700,000 in standard form
Answer: 3.7 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 45
Answer: (x + 9)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 17cm, angle = 38°. Find opposite. Give your answer to 2 decimal places
Answer: 13.28cm -
4. Ratio Mixed ratio problems
In ratio 5:7:2, what fraction is the second part?
Answer: 1⁄2 -
5. Statistics Mean
The mean of 6 numbers is 32. If 5 of them are 27, 19, 25, 35, 24, what is the missing number?
Answer: 62